Question

A small brownish irregular macule on the palm of a 13-year-old girl is examined by a dermatologist in her Louisiana home town. A skin scraping from the lesion is obtained for microscopic observation and culture. Microscopic examination of the specimen shows brownish filaments or hyphae and yeast cells. The most likely diagnosis is

a. Tinea capitis

b. Tinea corporis

c. Tinea manuum

d. Tinea nigra

e. Tinea pedis

Answer 1

D. Tinea nigra.

Tinea captis is ringworm of scalp, tinea pedis is ringworm of foot and tinea corporis is ring worm of arms and legs. Tinea manuum and tinea nigra affects soles. In case of tinea manuum red scaly lesions are produced where as tinea nigra is characterized by brown to black patches on the palms and soles