Mees' lines

System: Skin & Nail Signs · All skin & nail signs

What it is — and how it is elicited

Single or multiple white bands running across the nails, moving outward as the nail grows.

What a positive finding suggests

Associated with arsenic poisoning, and also with chemotherapy and severe systemic illness.

◈ Behind the name

Reinder Anne Mees (1887–1962), Dutch physician.

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Please note: This page is an educational reference about clinical examination signs. A clinical sign supports — and never replaces — a full clinical evaluation, examination and appropriate testing. A sign being present does not by itself prove a diagnosis, and an absent sign does not rule one out. If you have symptoms that worry you, see a health professional.