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Article
April 1966

Transverse Ridging of the Thumbnails: "Washboard Thumbnails"

Author Affiliations

FARGO, ND

From the Department of Dermatology, Fargo Clinic, Fargo, ND.

Arch Dermatol. 1966;93(4):421-423. doi:10.1001/archderm.1966.01600220033010
Abstract

If transverse ridging of the thumbnails exists without history of injury and without involvement of the other nails, the most probable explanation is the patient's compulsion to traumatize the thumb, usually with another finger of the same hand.

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