Yellow-green fluorescence. Vitiligo = no fluorescence; Pityriasis alba = no fluorescence; Tinea capitis (M. canis) = blue-green, but this is on the face/trunk.
Tense bullae + linear IgG along basement membrane. Pemphigus vulgaris has flaccid bullae + IgG in intercellular spaces (fishnet pattern). dermatology mcq pdf
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 Yellow-green fluorescence
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 Tense bullae + linear IgG along basement membrane
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 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
A patient on carbamazepine develops fever, facial edema, widespread dusky red macules with target lesions and mucosal erosions. Diagnosis: A) Urticaria B) Erythema multiforme major C) Stevens-Johnson syndrome D) Fixed drug eruption