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Musculoskeletal and Dermatology Flashcards

7 cards from real AMC MCQ practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. A 6-year-old has an itchy, well-demarcated honey-coloured crusted lesion around the nose and mouth. What is the most likely diagnosis?

    Answer: Impetigo

    Honey-coloured crusting is the classic appearance of impetigo, usually caused by Staphylococcus aureus.

  2. Which organism most commonly causes cellulitis?

    Answer: Streptococcus pyogenes

    Group A streptococcus and Staphylococcus aureus are the leading causes of cellulitis.

  3. A patient develops a target-shaped lesion with concentric rings after a recent herpes infection. What is the diagnosis?

    Answer: Erythema multiforme

    Target lesions following herpes simplex are characteristic of erythema multiforme.

  4. Which feature distinguishes psoriasis plaques on examination?

    Answer: Silvery scale over extensor surfaces with Auspitz sign

    Well-demarcated plaques with silvery scale and pinpoint bleeding (Auspitz sign) typify psoriasis.

  5. A pigmented skin lesion shows asymmetry, irregular borders, colour variation and a diameter over 6mm. What is the most concerning diagnosis?

    Answer: Malignant melanoma

    The ABCDE criteria raise strong suspicion of malignant melanoma.

  6. What is the most common type of skin cancer?

    Answer: Basal cell carcinoma

    Basal cell carcinoma is the most common skin malignancy, typically slow-growing with a pearly rolled edge.

  7. A young adult presents with an oval 'herald patch' followed days later by a 'Christmas tree' distribution of scaly lesions on the trunk. What is the diagnosis?

    Answer: Pityriasis rosea

    A herald patch followed by a fir-tree pattern is classic for pityriasis rosea.