Koilonychia (spoon-shaped nails) is classically associated with: A) Psoriasis B) Iron deficiency anemia C) Fungal infection D) Lichen planus
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 positive Nikolsky sign (epidermal peeling with lateral pressure) is classically seen in: A) Bullous pemphigoid B) Pemphigus vulgaris C) Psoriasis D) Lichen planus
A 5-year-old has honey-colored crusted lesions around the nares and on the face. Gram stain shows Gram-positive cocci in chains. Best initial therapy: A) Oral vancomycin B) Topical mupirocin C) Oral acyclovir D) Topical clotrimazole
A patient presents with sudden onset of diffuse erythroderma (>90% body surface area redness and scaling), with chills and tachycardia. This is most commonly a complication of: A) Atopic dermatitis B) Psoriasis C) Contact dermatitis D) Scabies
Tense bullae + linear IgG along basement membrane. Pemphigus vulgaris has flaccid bullae + IgG in intercellular spaces (fishnet pattern).
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 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
