What is the likely diagnosis of a black line on a toenail for 4 years that does not grow with the nail?
Abstract
A black line on a toenail persisting without growth for four years is concerning for subungual melanoma, although benign conditions like longitudinal melanonychia are possible. Histopathological evaluation is critical to confirm diagnosis.
Fields of Study & Subjects
Cutaneous Melanoma Detection and Management
Nail Diseases and Treatments
Cancer and Skin Lesions
Publication details
- Journal / source
- Zenodo (CERN European Organization for Nuclear Research)
- Publication date
- 28 January 2026