Tinea Nigra

Key Points
Skin condition which affects the palms and/or soles and most commonly appears in tropical climates
Caused by brown mold infection
Consists of patches of black or brown discoloration, which are persistent and may be accompanied by scaling

Tinea nigra is a skin condition which typically affects the palms of the hands and/or the soles of the feet. The condition consists of patches of black or brown discoloration in the affected area, which grow slowly. The condition is persistent, and may be accompanied by scaling.

Tinea nigra is caused by a brown mold infection, which is typically contracted through contact with infected soil. The condition most commonly appears in areas with tropical climates, and persons suffering from hyperhidrosis are at increased risk of contracting the disorder.

Differential Diagnosis (Other conditions with similar appearance)
Addison Disease
Atypical Mole
Malignant Melanoma
Nevi, melanocytic
Syphilis
Yaws

Diagnosis
Key Points
Diagnosis based on laboratory examination of skin scrapings
Cultures of the affected area may be performed to confirm diagnosis

Tinea nigra is typically diagnosed based on a laboratory examination of skin scrapings from the affected area. Laboratory cultures may be performed to confirm the diagnosis.

Treatment
Condition responds well to treatment
Treatment typically consists of Topical antifungal medications
Treatment course lasts approximately 2-4 weeks in most cases

Tinea nigra responds well to treatment, which typically consists of the administration of Topical antifungal medications. Treatment courses last approximately 2-4 weeks in most cases.