Which of the following is a histological hallmark of psoriasis? A) Acantholysis B) Spongiosis C) Munro microabscesses D) Civatte bodies
An elderly farmer has a firm, erythematous nodule on the helix of the ear, with central ulceration and rolled borders. Most likely: A) Actinic keratosis B) Basal cell carcinoma C) Squamous cell carcinoma D) Keratoacanthoma
A patient with diabetes has a well-demarcated, erythematous, scaly plaque in the groin. KOH shows pseudohyphae and budding yeast. Most likely organism: A) Trichophyton rubrum B) Candida albicans C) Malassezia furfur D) Sarcoptes scabiei dermatology mcq pdf
A patient with fair skin has a new 6 mm pigmented lesion with irregular borders, variegated color, and recent change. Best next step: A) Topical 5-FU B) Shave biopsy C) Excisional biopsy with 1-2 mm margins D) Observation for 3 months
A 40-year-old woman has multiple painful, erythematous nodules on the shins, along with fever and arthralgias after a streptococcal throat infection. Most likely: A) Erythema migrans B) Erythema nodosum C) Erythema multiforme D) Erythema marginatum Which of the following is a histological hallmark
A 30-year-old woman develops well-defined hypopigmented macules on the face, with fine scale. Wood’s lamp shows yellow-green fluorescence . Likely diagnosis: A) Vitiligo B) Pityriasis alba C) Tinea versicolor D) Leprosy
A positive Nikolsky sign (epidermal peeling with lateral pressure) is classically seen in: A) Bullous pemphigoid B) Pemphigus vulgaris C) Psoriasis D) Lichen planus KOH shows pseudohyphae and budding yeast
A patient presents with violaceous, polygonal, pruritic papules on the wrists. Histology shows saw-tooth rete ridges and band-like lymphocytic infiltrate. Diagnosis: A) Psoriasis B) Lichen planus C) Discoid lupus D) Scabies