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Musculoskeletal and Dermatology · USMLE Step 1 · Healthcare and Nursing

USMLE Dermatology: Skin Lesion Recognition

Classic skin lesion morphology (macule, papule, vesicle, plaque) matched to the disease it signals, one lesion per card.

About this set

40 basic cards for USMLE Step 1 Musculoskeletal and Dermatology. Set 3 of 3 in USMLE Dermatology. It opens with "Classic skin lesion in herpes simplex virus infection?" and "Dew drops on a rose petal appearance of vesicles is classic for which disease?". Study it alongside the other USMLE Step 1 sets below.

40 cards · basic cards · AI-written, checked twice. Edit anything.

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Classic skin lesion in herpes simplex virus infection?
Show answerGrouped vesicles on an erythematous base
Dew drops on a rose petal appearance of vesicles is classic for which disease?
Show answerVaricella (chickenpox)
Classic skin lesion in psoriasis?
Show answerWell-demarcated plaques with silvery-white scale
An expanding annular erythematous patch with central clearing (erythema migrans) signals which disease?
Show answerLyme disease
Classic skin lesion in tinea corporis (ringworm)?
Show answerAnnular plaque with a raised, scaly border and central clearing
Classic skin lesion in molluscum contagiosum?
Show answerUmbilicated, flesh-colored papules
Classic primary skin lesion in acne vulgaris?
Show answerComedones (open, blackhead, or closed, whitehead)
Classic skin lesion of seborrheic keratosis?
Show answerA 'stuck-on' waxy, warty plaque
Classic skin lesion of actinic keratosis?
Show answerA rough, scaly papule on sun-exposed skin
Classic skin lesion of basal cell carcinoma?
Show answerA pearly papule with rolled borders and telangiectasias
Classic skin lesion of squamous cell carcinoma?
Show answerA scaly, ulcerated papule or plaque on sun-exposed skin
Classic skin lesion of melanoma?
Show answerAn asymmetric pigmented macule or papule with irregular borders
Classic skin lesion in urticaria (hives)?
Show answerTransient, pruritic, edematous wheals
Target (iris) lesions are the classic skin finding in which condition?
Show answerErythema multiforme
Classic skin lesion in pemphigus vulgaris?
Show answerFlaccid bullae with a positive Nikolsky sign

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