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Ruggero Caputo, MD; Giorgio Prandi, MD

Arch Dermatol. 1973;108(6):817-818.

Abstract
A 45-year-old patient had an acquired abnormality in which the distal part of the nail bed remained adherent to the ventral surface of the nail plate eliminating, thereby, the distal groove. The disorder was not familial; it seems to have arisen spontaneously and gradually, involving several symmetrical fingers. There were no nail plate alterations and the soft periunguinal tissues were normal.

For this pathologic entity we suggest the term "pterygium inversum unguis". A possible explanation for this nail bed abnormality is that it represents an acquired reversion, without an apparent cause, to a more primitive type of structure.

Author Affiliations
Milan, Italy

From the 1° Clinica Dermatologica, Università di Milano, Milan, Italy.

Footnotes
Accepted for publication May 26, 1973.

Reprint requests to 1° Clinica Dermatologica, Università di Milano, Via Pace 9, 20122 Milano, Italy (Dr. Caputo).

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