Dermatology Mcq Pdf Official

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

Neutrophilic microabscesses in stratum corneum. Acantholysis = pemphigus; Spongiosis = eczema; Civatte bodies = lichen planus.

Tense bullae + linear IgG along basement membrane. Pemphigus vulgaris has flaccid bullae + IgG in intercellular spaces (fishnet pattern). dermatology mcq pdf

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

Only Microsporum species (M. canis, M. audouinii) fluoresce bright blue-green. Trichophyton species do not fluoresce. 6. Recommended Resources for Further Study | Resource | Type | |----------|------| | Andrews’ Diseases of the Skin | Textbook | | Fitzpatrick’s Color Atlas | Atlas | | Dermatology DDx Deck (Usatine) | Flashcards | | First Aid for the USMLE (Derm chapter) | Review | | Free online question banks | Qbank | End of PDF sample – 20 MCQs. To generate additional sets (100, 500, or specialty topics), contact or use a question generator. A patient with diabetes has a well-demarcated, erythematous,

A Wood’s lamp examination of a scaly scalp lesion shows bright blue-green fluorescence . Likely pathogen: A) Trichophyton tonsurans B) Microsporum canis C) Candida albicans D) Malassezia furfur 4. Answer Key | Q | A | Q | A | Q | A | Q | A | |---|---|---|---|---|---|---|---| | 1 | C | 6 | B | 11 | C | 16 | B | | 2 | B | 7 | A | 12 | C | 17 | B | | 3 | C | 8 | B | 13 | C | 18 | B | | 4 | B | 9 | B | 14 | C | 19 | B | | 5 | B | 10 | C | 15 | B | 20 | B | 5. Detailed Explanations (Selected) Q1. C – Tretinoin Topical retinoids (tretinoin, adapalene) are first-line for comedonal acne because they normalize desquamation. Benzoyl peroxide is better for inflammatory acne.

Yellow-green fluorescence. Vitiligo = no fluorescence; Pityriasis alba = no fluorescence; Tinea capitis (M. canis) = blue-green, but this is on the face/trunk. Yellow-green fluorescence. Vitiligo = no fluorescence

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