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Dermatology · Nail disorders
Sample itemWhich nail feature suggests iron deficiency or chronic trauma rather than fungal infection?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
A. Koilonychia with spoon-shaped nails
Koilonychia is spooning of the nail plate and may be associated with iron deficiency or repeated local trauma, unlike onychomycosis.
Option by option
A. Koilonychia with spoon-shaped nails (correct)
Correct: spoon-shaped nails are called koilonychia.
B. Painful periungual vesicles
Periungual vesicles suggest herpetic whitlow.
C. Pitting across multiple nails
Nail pitting can occur in psoriasis.
D. Thick subungual debris with yellow discoloration
Yellow thick subungual debris suggests onychomycosis.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.