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
Tense bullae + linear IgG along basement membrane. Pemphigus vulgaris has flaccid bullae + IgG in intercellular spaces (fishnet pattern). dermatology mcq pdf
A 70-year-old man has tense bullae on the trunk and proximal limbs, with no mucosal lesions. Direct immunofluorescence shows linear IgG along the basement membrane. Diagnosis: A) Pemphigus vulgaris B) Bullous pemphigoid C) Dermatitis herpetiformis D) Epidermolysis bullosa acquisita A patient with fair skin has a new
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 70-year-old man has tense bullae on the
A child has intensely pruritic vesicles on the flexural aspects of elbows and knees, with personal/family history of asthma and hay fever. Most likely diagnosis: A) Contact dermatitis B) Atopic dermatitis C) Scabies D) Dermatitis herpetiformis
Neutrophilic microabscesses in stratum corneum. Acantholysis = pemphigus; Spongiosis = eczema; Civatte bodies = lichen planus.