ABD Hair and Nail Disorders Flashcards
6 cards from real ABD practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 ABD Hair and Nail Disorders flashcards as text
What is the most common cause of diffuse hair loss in adult women in the US?
Answer: Female pattern hair loss (androgenetic alopecia)
Female pattern hair loss (androgenetic alopecia) is the most common cause of hair loss in adult women, affecting up to 40% by age 50.
Which dermoscopic finding is pathognomonic for alopecia areata?
Answer: Black dots (cadaverized hairs)
Black dots (cadaverized hairs), exclamation mark hairs, and yellow dots are all characteristic dermoscopic features of alopecia areata.
Onychomycosis is most commonly caused by which organism in the United States?
Answer: Trichophyton rubrum
Trichophyton rubrum accounts for approximately 70-80% of onychomycosis cases in the US and is the predominant causative dermatophyte.
Nail pitting is a manifestation of psoriasis affecting which part of the nail unit?
Answer: Nail matrix
Nail pitting results from focal parakeratosis in the proximal nail matrix that sloughs off, leaving small depressions on the nail surface.
Yellow nail syndrome is classically defined by which triad?
Answer: Yellow nails, lymphedema, and pleural effusions
Yellow nail syndrome is characterized by slow-growing yellow nails with onycholysis, lymphedema, and pleural effusions or other respiratory manifestations.
Acral lentiginous melanoma disproportionately affects which population and frequently presents as subungual melanoma?
Answer: Non-Hispanic Black and Asian patients
Acral lentiginous melanoma is the most common melanoma subtype in non-Hispanic Black and Asian populations, frequently arising in the nail unit as subungual melanoma.