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Images in Dermatology
October 26, 2022

Tinea Nigra Palmaris

Author Affiliations
  • 1Department of Dermatology, Military Hospital, Agra, India
  • 2Department of Dermatology, Motilal Nehru Medical College, Allahabad, India
JAMA Dermatol. 2022;158(12):1439. doi:10.1001/jamadermatol.2022.4442

A man in his 20s presented with a 2-year history of slowly increasing, asymptomatic dark spots on his left palm. On examination, there were multiple coalescing brownish black macules with irregular borders over the left palm and palmar aspect of the digits, with black pigmentary accentuation over the creases. They were devoid of any scaling or signs of inflammation (Figure). A direct microscopic examination (DME) on potassium hydroxide (10%) mount revealed brown branched septate hyphae. A culture in Sabouraud agar revealed brownish black wet colonies after 1 month of inoculation at 21 °C. A diagnosis of tinea nigra palmaris was made, and he was treated with topical azoles and keratolytics with excellent response and resolution within 2 months of therapy.

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