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October 1974

Pincer and Trumpet Nails

Author Affiliations

Cannes, France

Arch Dermatol. 1974;110(4):639-640. doi:10.1001/archderm.1974.01630100087034

To the Editor.—  Pincer nail is a dystrophy characterized by a transverse overcurvature that increases along the longitudinal axis of the nail and reaches its greatest proportion at the distal part.1 At this point, a particular type of ingrown nail is seen; the lateral borders tighten around the soft tissues, which they pinch without necessarily breaking through the epidermis. After a while, the soft tissue may actually disappear and can even be accompanied by a resorption of the underlying bone as has been noted previously by Cornelius and Shelley.2These lateral borders of the nail act as levers and maintain a permanent constriction of the deformed nail plate. In extreme cases, they can join together, forming a tunnel or they may roll about themselves in the form of a cone. In certain varieties, the nails are shaped in the form of claws or resemble pachyonychia congenita.1This

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