ABD ABD Hair and Nail Disorders

Question 1

What is the most common cause of diffuse hair loss in adult women in the US?

Accepted Answer

Female pattern hair loss (androgenetic alopecia)

Answer

Alopecia areata

Answer

Telogen effluvium

Answer

Traction alopecia

Question 2

Which dermoscopic finding is pathognomonic for alopecia areata?

Accepted Answer

Black dots (cadaverized hairs)

Answer

Perifollicular scaling

Answer

Fibrotic white dots

Answer

Comma hairs only

Question 3

Onychomycosis is most commonly caused by which organism in the United States?

Accepted Answer

Trichophyton rubrum

Answer

Candida albicans

Answer

Trichophyton mentagrophytes

Answer

Epidermophyton floccosum

Question 4

Nail pitting is a manifestation of psoriasis affecting which part of the nail unit?

Accepted Answer

Nail matrix

Answer

Nail bed

Answer

Hyponychium

Answer

Lateral nail fold

Question 5

Yellow nail syndrome is classically defined by which triad?

Accepted Answer

Yellow nails, lymphedema, and pleural effusions

Answer

Yellow nails, onycholysis, and paronychia

Answer

Yellow nails, clubbing, and cyanosis

Answer

Yellow nails, pachyonychia, and hyperhidrosis

Question 6

Acral lentiginous melanoma disproportionately affects which population and frequently presents as subungual melanoma?

Accepted Answer

Non-Hispanic Black and Asian patients

Answer

Fair-skinned individuals of Northern European descent

Answer

Hispanic patients exclusively

Answer

Patients with Fitzpatrick type III skin only