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Skin disease
Longitudinal melanonychia
A brown or black band running along the nail. In children it is almost always benign, but it does require dermoscopic assessment.
Bands that change, widen or appear in adulthood warrant careful investigation.
This information is general and does not replace a consultation — diagnosis is always made in person. Mutual Clinic Braga 253 772 064 · Mutual Clinic Arcozelo 227 537 000 · B.clinic Funchal 291 142 030.