The most likely diagnosis for Tom, a 70-year-old man presenting with sudden, painless vision loss in his left eye, is Central Retinal Vein Occlusion (CRVO). This condition is characterized by a blockage of the central retinal vein, leading to impaired blood flow and resulting in multiple retinal hemorrhages, venous dilation, cotton wool spots, and optic disc swelling—all of which were observed during the fundoscopic examination. Tom’s history of long-standing hypertension and type 2 diabetes mellitus places him at increased risk for vascular occlusions. The sudden onset of painless vision loss, coupled with the significant fundoscopic findings, strongly supports the diagnosis of CRVO. Differential Diagnoses:

1. Central Retinal Artery Occlusion (CRAO): This condition typically presents with sudden, painless vision loss but is characterized by a pale retina and a “cherry-red spot” at the fovea on examination. Given Tom’s findings of hemorrhages and disc swelling, CRAO is less likely.
2. Diabetic Retinopathy: While Tom has diabetes, diabetic retinopathy usually presents with more gradual vision loss and specific changes like microaneurysms and exudates rather than the acute presentation seen in CRVO. Additionally, diabetic retinopathy would not typically cause the extensive retinal hemorrhages seen in this case.
3. Hypertensive Retinopathy: This condition can lead to changes in the retina due to chronic hypertension but does not usually cause sudden vision loss or the specific findings associated with CRVO. It typically presents with retinal changes such as cotton wool spots and flame-shaped hemorrhages but lacks the venous dilation characteristic of CRVO.
4. Ischemic Optic Neuropathy: This condition can cause sudden vision loss but typically presents with a painful loss of vision and is associated with optic disc edema rather than retinal findings like hemorrhages or cotton wool spots.
5. Ocular Ischemic Syndrome: This syndrome results from carotid artery disease leading to retinal ischemia but would usually present with more chronic symptoms rather than an acute episode of vision loss. It also typically involves other systemic signs related to vascular insufficiency.

In summary, given Tom’s acute, painless vision loss and the significant findings on examination—particularly the presence of multiple retinal hemorrhages and swollen optic disc—the diagnosis of Central Retinal Vein Occlusion is most appropriate. Urgent referral for ophthalmological evaluation and management is necessary to address this condition effectively.Clinical References:

• The Australian Guidelines for Managing Retinal Vein Occlusion emphasize the importance of recognizing CRVO as a cause of sudden vision loss in patients with vascular risk factors.
• The Royal Australian College of Ophthalmologists provides best practice recommendations for diagnosing and managing retinal disorders, including CRVO.
• Healthdirect Australia outlines symptoms and management strategies for retinal vein occlusions.
• The National Eye Institute offers comprehensive information on CRVO, including its symptoms, risk factors, and treatment options.

This man has established coronary artery disease and so it is inappropriate to use a cardiovascular primary prevention risk tool. References: 1. https://www.racgp.org.au/clinical-resources/clinical-guidelines/key-racgp-guidelines/view-all-racgp-guidelines/red-book/prevention-of-vascular-and-metabolic-disease 2. https://www.mja.com.au/journal/2018/209/4/absolute-cardiovascular-disease-risk-and-lipid-lowering-therapy-australia 3. https://www.bmj.com/content/361/bmj.k2137 4. https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(19)31053-0/fulltext 5. https://www.nejm.org/doi/full/10.1056/NEJMo

Correct Answer : To determine if Alex can consent independently, assess his maturity, understanding of the procedure, ability to express his wishes, and overall decision-making capacity. Differential Diagnoses: 1. Gillick competence; 2. Age of consent laws; 3. Understanding of medical risks; 4. Decision-making ability; 5. Parental consent laws; 6. Legal requirements for consent; 7. Emotional and cognitive maturity. Incorrect Answers: B) Parental consent is important but does not replace assessing the adolescent’s capacity to consent. C) Legal age and schooling are part of the assessment but not sufficient alone. D) The medical condition and necessity are relevant but should be considered alongside the adolescent’s consent capacity. E) Understanding risks is important, but full decision-making ability and maturity must also be evaluated.

The most appropriate management strategy for John, a 72-year-old man with stage 4 chronic kidney disease (CKD), is to initiate oral iron supplementation, sodium bicarbonate, and calcitriol, along with a referral to a nephrologist for comprehensive management of his CKD-related complications. This approach addresses multiple issues associated with advanced CKD, including anemia, metabolic acidosis, and secondary hyperparathyroidism.Differential Diagnoses:

1. Renal Anemia: Given John’s hemoglobin level of 92 g/L and his chronic kidney disease, renal anemia is a significant concern. However, starting erythropoiesis-stimulating agents (ESAs) without first addressing his iron status would be premature. John’s ferritin level of 150 μg/L indicates adequate iron stores, but the transferrin saturation of 22% suggests that he may benefit from oral iron supplementation to optimize his response to ESAs in the future.
2. Metabolic Acidosis: John’s serum bicarbonate level of 18 mmol/L indicates mild metabolic acidosis, which is common in patients with advanced CKD due to the kidneys’ reduced ability to excrete acid. Sodium bicarbonate supplementation is appropriate to help correct this acidosis and improve his overall metabolic status.
3. CKD-Mineral Bone Disorder (CKD-MBD): The elevated parathyroid hormone (PTH) level at 18 pmol/L raises concerns about secondary hyperparathyroidism, which is common in patients with CKD. Calcitriol (active vitamin D) is indicated to help manage PTH levels and improve calcium metabolism, thus addressing the mineral bone disorder associated with his kidney disease.
4. Iron Deficiency Anemia: While John’s ferritin level suggests that he does not currently have iron deficiency anemia, it is crucial to monitor his iron status closely and provide supplementation as needed to prevent further deterioration of his hemoglobin levels.
5. Calcium Carbonate Alone: While calcium carbonate can be used to manage hyperphosphatemia in CKD patients, relying solely on this treatment does not address the multifaceted issues of anemia and metabolic acidosis that John is experiencing. A more comprehensive approach is necessary for effective management.
6. Blood Transfusion: Transfusions are generally not indicated for chronic stable anemia unless there are acute complications or severe symptoms present. In John’s case, managing the underlying causes of his anemia through iron supplementation and potential ESA therapy is a more appropriate strategy.

In conclusion, the combination of oral iron supplementation, sodium bicarbonate for metabolic acidosis, calcitriol for managing secondary hyperparathyroidism, and referral to a nephrologist constitutes a comprehensive approach to managing John’s complex CKD-related complications effectively.Clinical References:

• The Australian Guidelines for Chronic Kidney Disease Management provide recommendations on managing complications such as anemia and metabolic acidosis in patients with advanced CKD.
• The Royal Australian College of General Practitioners outlines best practices for monitoring and treating patients with CKD, emphasizing the importance of addressing multiple complications.
• The National Kidney Foundation offers resources on the management of anemia and mineral bone disorders in patients with chronic kidney disease.
• The Australian Society of Nephrology provides clinical practice guidelines for the management of patients with kidney disease, focusing on comprehensive care strategies tailored to individual patient needs.

Basal cell carcinoma is the most likely diagnosis, especially given the chronic, non-healing ulcer with a raised white margin and the history of prolonged sun exposure in Australia. This type of skin cancer commonly presents with similar features.

The most appropriate additional investigation to reveal the underlying cause of the stroke in this 34-year-old woman is testing for anticardiolipin antibodies. Given her sudden onset of right arm weakness, expressive dysphasia, and right-sided facial droop, which are indicative of an ischemic stroke affecting the left frontoparietal region, it is crucial to explore potential hypercoagulable states, especially considering her history of deep vein thrombosis (DVT) and the presence of thrombocytopenia.

Rationale for Diagnosis:

1. Anticardiolipin Antibodies: These antibodies are part of the antiphospholipid syndrome (APS), which is characterized by recurrent thrombotic events. The presence of anticardiolipin antibodies can indicate a prothrombotic state that increases the risk of both venous and arterial thrombosis, including strokes. Given her previous DVT, testing for these antibodies is particularly relevant.
2. Hypercoagulable State: The patient’s history suggests a possible underlying autoimmune disorder or hypercoagulable condition, which could explain her stroke at a relatively young age. Identifying anticardiolipin antibodies would help confirm a diagnosis of APS, which is known to cause ischemic strokes in young adults.
3. Thrombocytopenia: The presence of thrombocytopenia can complicate the clinical picture but does not directly explain the stroke. However, it may be associated with autoimmune processes that also lead to antiphospholipid antibody production.

Differential Diagnoses:

1. Antiphospholipid Syndrome (APS): This is the most likely diagnosis given her history of DVT and the acute presentation of stroke symptoms. Testing for anticardiolipin antibodies is essential to confirm this diagnosis.
2. Migraine-Related Stroke: While she has a history of migraines, they typically present differently and would not account for the acute focal neurological deficits observed in this case.
3. Ischemic Heart Disease: Although she has a history of ischemic heart disease, it generally leads to heart-related symptoms rather than isolated neurological deficits without other cardiac manifestations.
4. Systemic Lupus Erythematosus (SLE): While SLE could present with similar symptoms and is associated with antiphospholipid antibodies, testing specifically for anticardiolipin antibodies is more pertinent in this context due to her previous thrombotic event.
5. Cerebral Venous Sinus Thrombosis (CVST): This could be considered but typically presents with different symptoms and would require imaging studies to confirm.
6. Transient Ischemic Attack (TIA): While TIA could cause transient symptoms, the current presentation indicates a completed stroke rather than transient symptoms that resolve quickly.
7. Other Thrombotic Disorders: Conditions such as factor V Leiden or prothrombin gene mutation could be considered but are less common than APS in young patients presenting with stroke.

In summary, given the patient’s clinical presentation—particularly her history of DVT and acute neurological deficits—the most appropriate additional investigation is testing for anticardiolipin antibodies to assess for antiphospholipid syndrome as a potential underlying cause of her ischemic stroke.

Clinical References:

• The Australian Guidelines for Stroke Management emphasize the importance of identifying underlying causes of stroke through appropriate laboratory tests.
• The Royal Australian College of General Practitioners provides best practice recommendations for evaluating patients with thrombotic events.
• Healthdirect Australia outlines the risks associated with antiphospholipid syndrome and its role in causing strokes.
• The National Heart Foundation of Australia highlights the significance of recognizing antiphospholipid syndrome as a contributor to thromboembolic events in young adults.

The correct answer is- Evidence of impaired professional performance. Reporting should be based on evidence that the colleague’s behavior is affecting their professional duties and patient safety. Differential diagnoses include stress-related behavior, substance use disorder, burnout, depression, anxiety, personal coping mechanisms, and recreational use without impairment.

The description of the eruption fits best with bullous impetigo, although this usually occurs in children. Staphylococcus aureus is the most common causative organism, although Streptococcus pyogenes can also be responsible for non-bullous impetigo. E. coli is not expected to cause skin infection. Pseudomonas may be found as a coloniser in chronic wounds but does not cause primary cutaneous infection in immunocompetent individuals. Varicella zoster virus causes chickenpox and subsequently shingles, neither of which fit the clinical picture described here. In Australia, proper antibiotic treatment is needed to manage impetigo and prevent transmission, especially in community settings like schools.

The most appropriate next step in the management of Lisa, a 45-year-old woman with a 10-day history of facial pain, purulent nasal discharge, and worsening cough, is to prescribe a 5-day course of amoxicillin. Given the duration of her symptoms, the presence of purulent nasal discharge, and localized facial tenderness, this presentation is consistent with acute bacterial sinusitis. Antibiotics are indicated when symptoms persist for more than 7-10 days and there are signs suggestive of a bacterial infection.Lisa’s symptoms have not improved with over-the-counter decongestants, indicating that her condition may have progressed beyond a viral infection. The facial pain localized around the maxillary sinus area, coupled with purulent discharge and mild fever, further supports the diagnosis of acute bacterial sinusitis.Differential Diagnoses:

1. Viral Sinusitis: Viral infections can cause similar symptoms such as nasal obstruction and facial pain. However, these typically resolve within 7-10 days without the need for antibiotics. Lisa’s persistent symptoms beyond this timeframe, along with purulent discharge, suggest a bacterial etiology rather than viral.
2. Allergic Rhinitis: This condition often leads to nasal congestion and can cause postnasal drip but does not typically present with purulent nasal discharge or significant facial pain. Lisa’s examination findings do not support an allergic cause.
3. Dental Abscess: While dental infections can cause facial pain and swelling, Lisa denies significant dental pain or recent trauma. The presence of purulent nasal discharge points more towards a sinus infection rather than a dental issue.
4. Nasal Polyps: Nasal polyps can lead to obstruction and chronic sinus issues but are less likely to cause acute symptoms such as Lisa is experiencing. They would typically present more chronically rather than acutely.
5. Upper Respiratory Infection: A common cold could lead to similar symptoms; however, it usually resolves without complications within a week or so. The persistence and severity of Lisa’s symptoms indicate that her condition has progressed beyond a simple upper respiratory infection.
6. Vasomotor Rhinitis: This condition can cause nasal congestion but does not typically result in purulent discharge or facial pain associated with sinus pressure.
7. Foreign Body in the Nasal Cavity: This could lead to unilateral nasal obstruction and discharge but would likely be accompanied by other signs such as foul-smelling discharge or acute onset of symptoms following an incident.

In summary, given Lisa’s clinical presentation of persistent facial pain, purulent nasal discharge, and localized tenderness in the maxillary area for over ten days, prescribing amoxicillin is the most appropriate management strategy to address her acute bacterial sinusitis effectively.Clinical References:

• The Australian Prescriber provides guidelines on the management of acute sinusitis, emphasizing the use of antibiotics like amoxicillin for bacterial infections.
• The Royal Australian College of General Practitioners outlines best practices for diagnosing and treating acute sinusitis in adults.
• Healthdirect Australia offers information on sinusitis treatment options including indications for antibiotic therapy based on symptom duration and severity.
• The National Health Service (NHS) provides comprehensive guidelines on managing acute sinusitis, highlighting when antibiotics are necessary based on clinical presentation.

The most likely diagnosis for the patient presenting with bleeding gums and a dietary history lacking fresh fruits and vegetables is vitamin C deficiency, also known as scurvy. This condition arises from insufficient vitamin C intake, which is crucial for collagen synthesis and overall tissue health. The symptoms of bleeding gums, along with the dietary history, strongly indicate this deficiency, as vitamin C is essential for maintaining healthy blood vessels and preventing bleeding. Differential Diagnoses:

1. Haemophilia: This inherited bleeding disorder is characterized by a deficiency in specific clotting factors, leading to prolonged bleeding episodes. However, haemophilia typically presents with more severe bleeding tendencies, such as spontaneous bruising or joint bleeding, which are not described in this case. The absence of a family history of bleeding disorders also makes this diagnosis less likely.
2. Von Willebrand Disease: Similar to haemophilia, this inherited condition affects blood clotting due to a deficiency of von Willebrand factor. Patients usually experience easy bruising and prolonged bleeding from mucosal surfaces. However, the specific presentation of bleeding gums alongside dietary insufficiency points more towards vitamin C deficiency rather than an inherited clotting disorder.
3. Idiopathic Thrombocytopenic Purpura (ITP): ITP is characterized by low platelet counts and can lead to easy bruising and bleeding. However, it typically presents with petechiae and purpura rather than the specific symptoms associated with scurvy, such as swollen and bleeding gums. Additionally, ITP would usually be accompanied by other signs of thrombocytopenia.
4. Henoch-Schönlein Purpura (HSP): This condition is a small-vessel vasculitis that presents with a characteristic rash, abdominal pain, and joint symptoms. While it can cause bleeding, the classic presentation does not align with the isolated symptoms of gum bleeding and dietary history noted in this patient.
5. Protein-Losing Enteropathy: This condition involves excessive loss of protein through the gastrointestinal tract, leading to edema and growth failure. While it can cause gastrointestinal symptoms and potentially contribute to nutritional deficiencies, it would typically present with more severe systemic signs than those observed in this patient.
6. Iron Deficiency Anemia: Although this condition can lead to pallor and fatigue, it does not typically cause gum bleeding or the other classic signs associated with vitamin C deficiency. Iron deficiency anemia would also not explain the specific oral manifestations seen in scurvy.

In summary, considering the clinical presentation of swollen gums and the relevant dietary history, vitamin C deficiency (scurvy) is the most appropriate diagnosis for this patient. Addressing dietary insufficiencies through increased intake of vitamin C-rich foods or supplementation will likely resolve the symptoms associated with this deficiency. Clinical References:

• The Australian Guidelines for Nutrition in Adults emphasize the importance of sufficient vitamin C intake for maintaining health and preventing deficiencies.
• Healthdirect Australia provides comprehensive information on scurvy, including its symptoms, causes, and dietary recommendations.
• The Australian Society for Parenteral and Enteral Nutrition outlines nutritional requirements that include adequate vitamin C levels to prevent deficiencies.
• The Royal Australian College of General Practitioners highlights the need for awareness of nutritional deficiencies like scurvy in clinical practice, especially in populations at risk due to poor dietary habits.

✔ Correct Answer: Milia – Provide reassurance and explain self-resolving nature

Milia are benign keratin-filled cysts resulting from blocked pilosebaceous units. They are common in neonates and resolve spontaneously within a few weeks. No treatment is required.

✘ Neonatal acne – Prescribe topical retinoids – Neonatal acne presents later (after 3–4 weeks), with inflammatory papules and pustules, often due to maternal androgen influence. Retinoids are not necessary for neonatal acne.

✘ Miliaria crystallina – Recommend cool baths – Miliaria crystallina presents as tiny, clear vesicles due to sweat duct obstruction in warm environments. The described lesions are not vesicular.

✘ Sebaceous hyperplasia – Perform gentle extraction – Sebaceous hyperplasia presents as yellowish papules due to maternal hormones and does not require extraction.

Learning Objective: Recognize milia as a common neonatal skin condition requiring no treatment.

The most appropriate treatment for Ms. Green, a 45-year-old woman presenting with a non-healing ulcerative lesion on her left forearm, is early excision of the lesion with a 3-5 mm margin. Given the characteristics of the lesion—firm to palpation, with a raised, irregular edge and central ulceration that intermittently bleeds—there is a strong concern for squamous cell carcinoma (SCC). This condition is particularly relevant considering her history of sun exposure and fair skin, which increase her risk for skin malignancies.Differential Diagnoses:

1. Basal Cell Carcinoma (BCC): While BCC can present as a non-healing sore or ulcer, it typically has a pearly appearance with rolled edges and may exhibit telangiectasia. The irregularity and firmness of Ms. Green’s lesion, along with its bleeding characteristics, make SCC more likely than BCC in this case.
2. Actinic Keratosis: This condition presents as rough, scaly patches on sun-exposed skin and can progress to SCC. However, actinic keratosis lesions are usually less firm and do not typically present as ulcerative lesions that bleed. Ms. Green’s lesion has progressed significantly over six months, indicating a higher likelihood of malignancy.
3. Keratoacanthoma: This is a rapidly growing tumor that resembles SCC but often resolves spontaneously. While it can present similarly with ulceration and bleeding, keratoacanthomas typically have a central keratin plug and grow quickly over weeks rather than months. The chronic nature of Ms. Green’s lesion makes this diagnosis less likely.
4. Chronic Dermatitis: Chronic dermatitis can cause non-healing lesions but is usually associated with itching or inflammation rather than the firm, ulcerative characteristics seen in Ms. Green’s case. The absence of significant pain or swelling also does not support dermatitis as the underlying cause.

In summary, given the clinical presentation of a firm, non-healing ulcerative lesion that intermittently bleeds and Ms. Green’s risk factors for skin cancer due to sun exposure and fair skin, early excision with appropriate margins is the most suitable management strategy to address potential squamous cell carcinoma effectively.Clinical References:

• The Australian Guidelines for Skin Cancer Management emphasize the importance of early excision for suspected malignant lesions.
• The Royal Australian College of General Practitioners provides best practice recommendations for diagnosing and managing skin cancers, including SCC.
• The Cancer Council Australia outlines risk factors and treatment options for skin cancers, highlighting the need for surgical intervention in cases of suspected malignancy.
• The Australian Dermatology Society offers resources on the clinical features and management strategies for various types of skin cancer, including squamous cell carcinoma and basal cell carcinoma.

Explanation: It is crucial to communicate clearly with the patient about the urgency of further investigation for the nodule, given its potential link to prostate cancer. Transparency about the possible seriousness and the need for urgent referral ensures that the patient understands the importance of prompt action and avoids misunderstandings. Ignoring or downplaying the finding would be inappropriate and could lead to missed diagnosis and treatment delays. Differential diagnoses include benign prostatic hyperplasia, prostatitis, prostate cancer, cysts, abscesses, calcifications, and other prostatic abnormalities.

The most appropriate management strategy for Ben, a 30-year-old man presenting with a three-week history of severe left-sided facial pain, nasal obstruction, and anosmia, is to prescribe a short course of oral corticosteroids along with intranasal corticosteroids. This approach is effective in reducing inflammation and the size of nasal polyps, thereby alleviating his symptoms and improving his quality of life.Ben’s clinical presentation, including swollen nasal mucosa, visible nasal polyps, purulent discharge, and a history of recurrent sinus infections, strongly suggests chronic rhinosinusitis with nasal polyps. This condition is characterized by ongoing inflammation of the sinuses and nasal cavity, often associated with allergic reactions or infections.Differential Diagnoses:

1. Allergic Fungal Sinusitis: This condition can present with similar symptoms, including nasal obstruction and facial pain. However, it typically involves a history of allergies and may show specific fungal elements upon imaging or biopsy. Ben’s symptoms and examination findings are more indicative of chronic rhinosinusitis rather than an allergic fungal process.
2. Chronic Rhinosinusitis with Nasal Polyps: This diagnosis fits Ben’s clinical picture well. The presence of nasal polyps along with his symptoms aligns with this condition. However, it is important to differentiate it from other forms of rhinosinusitis that do not involve polyps.
3. Vasomotor Rhinitis: This condition can cause nasal obstruction and rhinorrhea but does not typically lead to the significant facial pain or anosmia that Ben is experiencing. It is more related to environmental triggers rather than structural changes like polyps.
4. Dental Infection: A dental abscess could cause facial pain and swelling; however, it would usually present with localized pain in the dental region and possibly fever or swelling in the jaw area. Ben’s symptoms are more diffuse and related to nasal obstruction rather than localized dental issues.
5. Deviated Septum: While a deviated septum can contribute to nasal obstruction and sinus issues, it does not typically cause the level of facial pain or anosmia that Ben is experiencing. Additionally, there are no indications in his history or examination suggesting a significant structural abnormality.
6. Chronic Otitis Media: This condition primarily affects the middle ear and would not explain Ben’s nasal symptoms or facial pain directly related to sinus involvement.
7. Nasal Septal Perforation: This condition can lead to nasal obstruction and discomfort but usually presents with additional symptoms such as crusting or bleeding from the nose, which are not reported in Ben’s case.

In summary, given Ben’s history of recurrent sinus infections, current symptoms of facial pain, nasal obstruction, anosmia, and the presence of nasal polyps observed during examination, the most effective management strategy involves prescribing oral corticosteroids to reduce inflammation and intranasal corticosteroids for ongoing maintenance therapy. This dual approach will help manage his chronic rhinosinusitis effectively while addressing the underlying inflammation associated with his nasal polyps.Clinical References:

• The Australian Guidelines for Chronic Rhinosinusitis provide recommendations on the management of chronic sinus conditions, emphasizing the role of corticosteroids.
• The Royal Australian College of General Practitioners outlines best practices for diagnosing and treating chronic rhinosinusitis in adults.
• The American Academy of Otolaryngology–Head and Neck Surgery provides clinical practice guidelines for managing chronic rhinosinusitis with nasal polyps.
• The National Health Service (NHS) offers comprehensive information on chronic sinusitis management strategies that include medications and lifestyle modifications tailored for patients experiencing similar symptoms.

The most likely diagnosis for Tom, a 45-year-old man experiencing burning pain and tingling in the lateral thigh, exacerbated by tight belts, is meralgia paresthetica. This condition results from compression of the lateral femoral cutaneous nerve, which supplies sensation to the skin of the outer thigh. Tom’s symptoms, including localized burning pain and tingling that does not cross the midline, are characteristic of this condition.Differential Diagnoses:

1. Sacroiliac Dysfunction: This condition typically presents with lower back pain and discomfort in the pelvic region rather than isolated lateral thigh symptoms. Tom’s symptoms are localized to the thigh and do not suggest involvement of the sacroiliac joint.
2. Peroneal Nerve Entrapment: Peroneal nerve entrapment can cause pain and sensory changes in the lower leg and foot rather than the thigh. Given that Tom’s symptoms are specifically in the lateral thigh area, this diagnosis is unlikely.
3. Tarsal Tunnel Syndrome: This syndrome involves compression of the posterior tibial nerve at the ankle, leading to symptoms in the foot rather than the thigh. Tom’s complaints do not align with this condition as they are focused on the upper thigh.
4. Acute Lower Limb Ischaemia: This condition typically presents with severe pain, pallor, pulselessness, and other systemic signs indicating compromised blood flow. Tom’s symptoms do not suggest ischaemia, as he has no signs of vascular compromise or systemic illness.

In summary, Tom’s presentation of burning pain and tingling localized to the lateral thigh that worsens with tight clothing strongly indicates meralgia paresthetica. This condition is often exacerbated by external pressure on the nerve, which aligns with Tom’s report of increased discomfort due to tight belts. Management may include lifestyle modifications such as avoiding tight clothing, physical therapy, or corticosteroid injections if conservative measures fail.Clinical References:

• The Australian Guidelines for Managing Meralgia Paresthetica provide insights into diagnosis and treatment options for this condition.
• The Royal Australian College of General Practitioners outlines best practices for assessing and managing neurological conditions affecting sensation in the lower limbs.
• The Mayo Clinic offers comprehensive information on meralgia paresthetica, including its symptoms and management strategies.
• The National Health Service (NHS) provides resources on nerve entrapment syndromes, emphasizing diagnostic criteria and treatment approaches for conditions like meralgia paresthetica.

The most likely diagnosis for Jake, the 12-year-old boy presenting with frequent nosebleeds, easy bruising, and a family history of bleeding disorders, is Haemophilia A or B. The clinical features of prolonged bleeding after dental work and minor cuts, along with the significant family history of similar bleeding issues in male relatives, strongly suggest a sex-linked recessive inheritance pattern typical of haemophilia. Both types of haemophilia result from deficiencies in clotting factors: Haemophilia A is due to factor VIII deficiency, while Haemophilia B is due to factor IX deficiency.Differential Diagnoses:

1. Von Willebrand Disease (VWD): While VWD can present with symptoms similar to those of haemophilia, such as easy bruising and prolonged bleeding, it is an autosomal dominant condition that affects both genders. The pattern of inheritance and the fact that Jake’s symptoms align more closely with haemophilia—especially given the family history of male relatives with bleeding disorders—make VWD less likely in this case.
2. Vitamin C Deficiency (Scurvy): This condition can lead to easy bruising and bleeding gums due to weakened connective tissue; however, it typically does not cause the severity of bleeding seen in haemophilia. Additionally, scurvy would be expected to present with dietary insufficiencies that are not indicated in Jake’s case.
3. Idiopathic Thrombocytopenic Purpura (ITP): ITP is characterized by low platelet counts leading to easy bruising and prolonged bleeding. However, it usually presents with more widespread petechiae and purpura rather than the specific bleeding patterns associated with haemophilia. Jake’s lack of significant systemic symptoms also makes ITP less likely.
4. Henoch-Schönlein Purpura (HSP): HSP is a small-vessel vasculitis that typically presents with a characteristic rash, abdominal pain, and joint symptoms. The absence of these additional symptoms in Jake’s presentation makes HSP an unlikely diagnosis.
5. Protein-Losing Enteropathy: While this condition can cause edema and growth failure due to protein loss through the gastrointestinal tract, it would generally present with more severe gastrointestinal symptoms than those observed in Jake.
6. Other Inherited Bleeding Disorders: Other conditions such as factor deficiencies or platelet function disorders could be considered; however, the specific family history and symptomatology align most closely with haemophilia.

In summary, given Jake’s clinical presentation of frequent nosebleeds, easy bruising, prolonged bleeding after minor injuries, and a family history of similar bleeding disorders in male relatives, Haemophilia A or B is the most appropriate diagnosis. Further evaluation by a hematologist for specific factor assays would be warranted to confirm the diagnosis and guide management.Clinical References:

• The Australian Guidelines for the Management of Bleeding Disorders provide comprehensive information on diagnosing and managing conditions like haemophilia.
• The Royal Children’s Hospital Melbourne offers resources on inherited bleeding disorders, including haemophilia and von Willebrand disease.
• The National Blood Authority Australia outlines protocols for the management of patients with bleeding disorders, emphasizing the importance of accurate diagnosis.
• The Australian Society for Haematology provides educational materials regarding the clinical features and management strategies for haemophilia in children.

The most likely diagnosis for Tom, a 65-year-old male presenting with a pearly, telangiectatic nodule on his nose that has been slowly growing over the past year and occasionally ulcerates, is basal cell carcinoma (BCC). This type of skin cancer is the most common non-melanoma skin cancer and is particularly prevalent in sun-exposed areas such as the face. The characteristics of the lesion—its pearly appearance, telangiectatic vessels, and tendency to ulcerate—are classic signs of BCC.Differential Diagnoses:

1. Squamous Cell Carcinoma (SCC): While SCC can present similarly with ulcerated lesions on sun-exposed skin, it typically has a more aggressive growth pattern and is often associated with keratinization or a scaly surface. Tom’s lesion is more consistent with BCC due to its pearly appearance and lack of significant scaling.
2. Actinic Keratosis: This precancerous condition presents as rough, scaly patches on sun-damaged skin and can progress to SCC. However, actinic keratosis does not typically present as a firm nodule with ulceration. Tom’s lesion appears more advanced than what would be expected from actinic keratosis.
3. Keratoacanthoma: This rapidly growing tumor can resemble SCC or BCC but usually presents as a dome-shaped nodule with a central keratin plug. Keratoacanthomas often resolve spontaneously, which does not align with Tom’s chronic lesion that has been progressively worsening.
4. Seborrheic Keratosis: These benign lesions are often mistaken for skin cancers but typically have a waxy, “stuck-on” appearance and do not ulcerate or bleed. The characteristics of Tom’s lesion do not match those of seborrheic keratosis.
5. Melanoma: This aggressive form of skin cancer can present as a changing mole or new pigmented lesion but typically has irregular borders and color variations. Tom’s lesion does not exhibit these features, making melanoma less likely.
6. Basal Cell Nevus Syndrome (Gorlin Syndrome): While this genetic condition predisposes individuals to multiple BCCs at a young age, Tom’s solitary lesion and age make this diagnosis unlikely.

In summary, given the clinical presentation of a pearly, telangiectatic nodule on the nose that has been slowly growing and occasionally ulcerates, the most appropriate diagnosis is basal cell carcinoma. Treatment typically involves surgical excision to ensure complete removal of the cancerous tissue while minimizing the risk of recurrence.Clinical References:

• The Australian Guidelines for the Management of Skin Cancer emphasize early detection and treatment strategies for basal cell carcinoma.
• The Royal Australian College of General Practitioners provides best practice recommendations for diagnosing and managing skin cancers, including BCC.
• The Cancer Council Australia outlines risk factors, treatment options, and follow-up care for patients diagnosed with basal cell carcinoma.
• Healthdirect Australia offers comprehensive information on basal cell carcinoma, including its presentation, diagnosis, and management strategies.

The most likely diagnosis for the 7-year-old boy presenting with short stature, poor weight gain, pallor, and a distended abdomen is coeliac disease. This diagnosis is supported by the combination of symptoms, including growth failure, pallor indicative of possible anemia, and abdominal distension. Coeliac disease is an autoimmune disorder triggered by the ingestion of gluten, leading to inflammation and damage in the small intestine, which can significantly impair nutrient absorption and result in various gastrointestinal and systemic symptoms.Differential Diagnoses:

1. Iron Deficiency Anemia: While this condition can explain the pallor observed in the child, it does not account for the significant growth failure or the abdominal distension. Iron deficiency anemia often presents with fatigue and pallor but lacks the gastrointestinal symptoms that are characteristic of coeliac disease.
2. Crohn’s Disease: This inflammatory bowel disease can present with similar symptoms such as abdominal pain and growth failure. However, Crohn’s disease typically includes additional symptoms like diarrhea and abdominal pain, which are not reported in this case. The absence of these symptoms makes Crohn’s disease a less likely diagnosis.
3. Chronic Kidney Disease: This condition can lead to anemia and growth retardation; however, it usually presents with other systemic signs such as hypertension or electrolyte imbalances. The child’s presentation lacks these systemic features, making chronic kidney disease an unlikely cause.
4. Hypothyroidism: Hypothyroidism can lead to fatigue and growth failure but typically does not present with abdominal distension. The combination of symptoms in this case points more towards a gastrointestinal issue rather than an endocrine one.
5. Protein-Losing Enteropathy: This condition involves excessive loss of protein through the gastrointestinal tract and can lead to edema and growth failure. However, it would generally present with more severe gastrointestinal symptoms such as diarrhea or significant protein malnutrition, which are not evident in this patient.
6. Malabsorption Syndrome: While coeliac disease is a type of malabsorption syndrome, other forms could also be considered. However, the specific symptom profile aligns more closely with coeliac disease due to its association with gluten intake and the characteristic findings on examination.

In summary, coeliac disease is the most fitting diagnosis for this child based on his clinical presentation and symptomatology. The combination of short stature, poor weight gain, pallor indicating potential anemia, and abdominal distension strongly suggests that he is experiencing malabsorption due to gluten intolerance.Clinical References:

• The Australian Guidelines for Coeliac Disease provide comprehensive information on diagnosis and management strategies for children suspected of having coeliac disease.
• The Royal Children’s Hospital Melbourne outlines diagnostic criteria for coeliac disease and emphasizes the importance of early detection in pediatric patients.
• The National Health Service (NHS) offers resources on coeliac disease that detail its symptoms, risk factors, and recommended screening protocols.
• The Australian Coeliac Society provides educational materials about coeliac disease in children, highlighting common presentations and the significance of dietary management following diagnosis.

The most likely diagnosis for Alex, a 33-year-old man presenting with gynecomastia and infertility, is Aromatase Excess Syndrome. This condition is characterized by elevated estradiol levels and low testosterone levels, resulting from an increased conversion of androgens to estrogens due to excessive aromatase activity. The presence of gynecomastia, along with the hormonal profile observed in Alex’s laboratory tests, strongly supports this diagnosis.Differential Diagnoses:

1. Klinefelter Syndrome: This genetic condition typically presents with small testes, elevated follicle-stimulating hormone (FSH) and luteinizing hormone (LH), and low testosterone levels. In Alex’s case, the normal FSH/LH levels observed would rule out Klinefelter syndrome as a diagnosis.
2. Hyperprolactinemia: Elevated prolactin levels can lead to low testosterone and symptoms such as gynecomastia. However, Alex’s lab results do not indicate elevated prolactin levels, making hyperprolactinemia an unlikely cause of his symptoms.
3. Androgen Insensitivity Syndrome: This condition presents with a female phenotype despite an XY karyotype and is associated with the inability to respond to androgens. Since Alex presents with male characteristics and symptoms of gynecomastia rather than ambiguous genitalia, this diagnosis is not applicable.
4. Congenital Adrenal Hyperplasia (CAH): CAH can lead to virilization and hormonal imbalances but typically presents with signs of adrenal insufficiency or virilization rather than isolated gynecomastia. Alex does not exhibit these virilization features, making CAH an unlikely diagnosis.
5. Testicular Tumor: While certain testicular tumors can secrete estrogens leading to gynecomastia, the absence of other symptoms associated with malignancy (such as significant weight loss or localized pain) reduces the likelihood of this diagnosis in Alex’s case.
6. Liver Disease: Liver dysfunction can impair estrogen metabolism and lead to gynecomastia; however, there are no indications of liver disease in Alex’s presentation or history.
7. Drug-Induced Gynecomastia: Certain medications can cause hormonal imbalances resulting in gynecomastia. However, without a specific medication history provided by Alex, this potential cause cannot be confirmed.

In summary, while several differential diagnoses were considered, the combination of elevated estradiol levels, low testosterone levels, and the presence of gynecomastia strongly indicates Aromatase Excess Syndrome as the most likely diagnosis for Alex.Clinical References:

• The Australian Guidelines for the Management of Gynecomastia provide insights into the evaluation and treatment of patients presenting with breast tissue enlargement in males.
• The Royal Australian College of General Practitioners offers resources on endocrine disorders that include information on aromatase excess syndrome and its management.
• The Endocrine Society’s Clinical Practice Guidelines outline diagnostic criteria for conditions associated with hormonal imbalances, including aromatase excess syndrome.
• The Australian Health System’s resources on genetic conditions highlight the importance of recognizing genetic syndromes like Aromatase Excess Syndrome in clinical practice.

Once treatment starts the earliest a child can return to school is 2 days provided there is a good response to treatment. Practical knowledge of incubation and quarantine periods will be required and is frequently asked by parents. References: 1. https://www.health.nsw.gov.au/Infectious/factsheets/Pages/childhood-conditions-and-school-exclusion.aspx 2. https://www.racgp.org.au/afp/2013/august/school-exclusion-times 3. https://www.rch.org.au/kidsinfo/fact_sheets/School_exclusion_table/ 4. https://www1.health.gov.au/internet/main/publishing.nsf/Content/cdna-song-impetigo.htm 5. https://www.mja.com.au/journal/2014/200/2/managing-and-preventing-outbreaks-communicable-diseases-childcare-and-school

The most likely diagnosis for Tom, a 2-year-old boy presenting with a small, soft lump above his belly button that becomes more prominent when he cries or strains, is an epigastric hernia. The characteristics of the lump being non-tender, easily reducible, and not causing discomfort, along with the examination findings of a 1.5 cm defect in the midline above the umbilicus, strongly indicate this diagnosis. Epigastric hernias are common in children and often present as a protrusion in the epigastric region, particularly during activities that increase intra-abdominal pressure, such as crying or straining.Differential Diagnoses:

1. Umbilical Hernia: Umbilical hernias occur at the umbilicus and are typically more common in infants. They often resolve spontaneously by the age of 4 years. In Tom’s case, the hernia is located above the umbilicus, making this diagnosis unlikely.
2. Omphalomesenteric Duct Remnant: This condition usually presents at or near the umbilicus and can cause similar symptoms. However, it typically involves a fibrous cord or cystic structure rather than a reducible lump above the belly button.
3. Urachal Cyst: Urachal cysts generally present lower on the abdomen and are associated with urinary symptoms or discharge. Tom’s presentation does not fit this pattern, as his symptoms are localized above the umbilicus without urinary complaints.
4. Diastasis Recti: This condition refers to a separation of the rectus abdominis muscles and does not create a true hernia. It would not present as a reducible lump but rather as a midline bulge during activities that increase abdominal pressure.
5. Lipoma: A lipoma is a benign fatty tumor that can appear as a soft lump but is typically not reducible and does not change size with straining. The characteristics of Tom’s lump do not align with those of a lipoma.
6. Abdominal Wall Hematoma: An abdominal wall hematoma could present as a lump following trauma but would usually be associated with pain or tenderness, which is not noted in Tom’s case.
7. Rectus Sheath Hematoma: Similar to an abdominal wall hematoma, this condition would typically present with pain and tenderness along with swelling in the rectus sheath area, which does not match Tom’s symptomatology.

Given these considerations, an epigastric hernia is the most appropriate diagnosis for Tom. The recommended management involves referring him for surgical evaluation since epigastric hernias do not typically resolve spontaneously and may lead to complications if left untreated.Clinical References:

• The Australian Guidelines for Hernia Management provide recommendations for evaluating and treating pediatric hernias, including epigastric hernias.
• The Royal Children’s Hospital Melbourne outlines diagnostic criteria and management strategies for pediatric abdominal wall hernias.
• The Australian Health System’s resources on pediatric surgery emphasize timely surgical intervention for symptomatic epigastric hernias.
• The Pediatric Surgery Library discusses clinical presentations and treatment options for epigastric hernias in children, reinforcing the need for surgical evaluation when diagnosed.

Herpes zoster (shingles) is characterized by severe, burning pain and vesicular lesions in a dermatomal distribution. Differential diagnoses include temporomandibular joint dysfunction, maxillary sinusitis, dental abscess, trigeminal neuralgia, glossopharyngeal neuralgia, and erysipelas.

The most likely cause of Tom’s spontaneous bleeding from the gums and easy bruising is coagulation abnormalities secondary to chronic liver disease. Tom’s history of cirrhosis, likely due to long-term alcohol use, significantly impacts his liver’s ability to produce clotting factors and maintain normal hemostasis. The elevated bilirubin and low albumin levels further indicate impaired liver function, which contributes to his bleeding symptoms. Differential Diagnoses:

1. Esophageal Varices: While esophageal varices are a common complication of portal hypertension associated with cirrhosis and can lead to significant bleeding, Tom’s primary symptoms are related to spontaneous gum bleeding and easy bruising rather than gastrointestinal bleeding. Although variceal bleeding is a serious concern in patients with cirrhosis, the absence of gastrointestinal symptoms makes this less likely as the primary cause of his current bleeding.
2. Portal Hypertensive Gastropathy: This condition involves changes in the gastric mucosa due to portal hypertension and can lead to chronic bleeding or anemia. However, it usually presents with gastrointestinal symptoms rather than isolated oral bleeding. The specific presentation of gum bleeding in Tom suggests a more systemic issue related to coagulation rather than localized gastric pathology.
3. Vitamin K Deficiency: This deficiency can lead to impaired coagulation and bleeding tendencies; however, it is typically associated with malnutrition or malabsorption syndromes. Given Tom’s chronic liver disease, while he may have some degree of malnutrition, the primary issue appears to be the liver’s inability to synthesize clotting factors effectively rather than a direct vitamin K deficiency.
4. Thrombocytopenia: Although low platelet counts can occur in cirrhosis due to splenomegaly or bone marrow suppression, Tom has not been reported to have a platelet count that would explain the severity of his bleeding symptoms alone. In patients with cirrhosis, thrombocytopenia is often present but does not solely account for the bleeding tendency without considering the liver’s overall function.
5. Coagulation Disorders (e.g., Hemophilia): While inherited coagulation disorders can cause spontaneous bleeding, Tom has no known history of such conditions, and his symptoms are more consistent with acquired coagulopathy due to liver dysfunction.
6. Idiopathic Thrombocytopenic Purpura (ITP): ITP could explain easy bruising and gum bleeding; however, it typically presents with more widespread petechiae and purpura rather than isolated oral symptoms in the context of chronic liver disease.

In summary, Tom’s spontaneous gum bleeding and easy bruising are most likely due to coagulation abnormalities resulting from his chronic liver disease and cirrhosis. The liver’s impaired ability to produce clotting factors leads to an increased risk of bleeding even with minimal trauma.Clinical References:

• The Australian Guidelines for the Management of Liver Disease provide insights into complications arising from chronic liver conditions, including coagulation issues.
• The Royal Australian College of General Practitioners outlines the management of patients with liver disease and their associated risks for bleeding.
• The National Health Service (NHS) offers resources on liver disease complications, emphasizing the relationship between liver function and coagulation.
• The Australian Society for Gastroenterology provides guidelines on managing portal hypertension and its complications, including variceal hemorrhage and other bleeding risks in patients with cirrhosis.