Bilateral tinea nigra plantaris and tinea nigra plantaris mimicking melanoma.
Tinea nigra, a superficial fungal infection caused by Phaeoannellomyces werneckii, presents as a hyperpigmented, nonscaling macule of variable size and shape. Typically lacking induration, erythema, or pruritus, these "ink spot" lesions may resemble junctional nevi or malignant melanoma. Rapid, noninvasive diagnosis can be provided by potassium hydroxide examination, demonstrating numerous large, dematiaceous hyphae.
Tseng
S S
SS
Department of Dermatology, New York-Presbyterian Hospital, Columbia Presbyterian Center, New York, USA.
Whittier
S
S
Miller
S R
SR
Zalar
G L
GL
D000328:Adult; D000935:Antifungal Agents / Q000008:administration & dosage; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007654:Ketoconazole / Q000008:administration & dosage; D008297:Male; D008545:Melanoma / Q000175:diagnosis* / Q000473:pathology; D010859:Pigmentation Disorders / Q000175:diagnosis* / Q000473:pathology; D012878:Skin Neoplasms / Q000175:diagnosis* / Q000473:pathology; D014008:Tinea Pedis / Q000175:diagnosis* / Q000188:drug therapy / Q000473:pathology; D016896:Treatment Outcome
D000935:Antifungal Agents; D007654:Ketoconazole