Clin Cosmet Investig Dermatol 2022 4;15:1-4. Epub 2022 Jan 4.
Department of Dermatology & STD, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, People's Republic of China.
The common causes for melanonychia include melanoma, repetitive trauma, underlying systemic diseases, onychomycosis, pseudomonas infection and drugs. Drug-induced melanonychia usually affects numerous nails and appears as light brown to black pigmentation on the deck or nail bed with longitudinal, transverse or diffuse distribution. In previous cases, a number of chemotherapeutic agents such as azathioprine, bleomycin sulfate, cyclophosphamide, hydroxyurea and methotrexate were usually linked to melanonychia. Read More