General Flashcards
7 cards from real Dermatologist Certificate practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 General flashcards as text
Which layer of the epidermis is responsible for cell division and renewal?
Answer: Stratum basale
The stratum basale contains mitotically active keratinocytes that continuously divide to renew the epidermis.
A patient presents with discrete, flat-topped, polygonal, violaceous papules on the wrists. What is the most likely diagnosis?
Answer: Lichen planus
Lichen planus classically presents with the '6 P's': pruritic, planar, polygonal, purple papules and plaques.
Which immunoglobulin is primarily found at the dermal-epidermal junction in bullous pemphigoid?
Answer: IgG
Bullous pemphigoid is characterized by IgG autoantibodies targeting BP180 and BP230 antigens at the dermal-epidermal junction.
A child presents with a 'strawberry tongue,' desquamating rash, and perioral pallor. What organism is responsible?
Answer: Group A Streptococcus
Scarlet fever is caused by Group A Streptococcus producing erythrogenic toxins, leading to the classic rash and strawberry tongue.
Which dermatoscopic structure is most associated with melanoma?
Answer: Atypical pigment network
An atypical (irregular) pigment network with variable thickness and abrupt termination at the periphery is a key dermoscopic feature of melanoma.
Tinea versicolor is caused by which organism?
Answer: Malassezia furfur
Tinea versicolor (pityriasis versicolor) is caused by the dimorphic yeast Malassezia furfur, part of normal skin flora.
Which vitamin deficiency causes pellagra, characterized by dermatitis, diarrhea, and dementia?
Answer: Vitamin B3 (niacin)
Pellagra results from niacin (vitamin B3) deficiency and classically presents with the '3 Ds': dermatitis, diarrhea, and dementia.
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