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June 2013

Dorsal Dimelia of the Fourth Toe in a Patient With Incontinentia Pigmenti

Author Affiliations

Author Affiliations: Department of Dermatology and Cutaneous Surgery, University of Miami, Miami, Florida.

JAMA Dermatol. 2013;149(6):761-762. doi:10.1001/jamadermatol.2013.1980

Development of a second nail plate on either the plantar or palmar surface of a digit, known as a double nail, is an extremely rare malformation. When dorsalization of the plantar skin is also present, the condition is referred to as dorsal dimelia. Additional findings associated with dorsal dimelia may include loss of flexion creases with absent flexion at the interphalangeal joints and tapering of the distal phalanx seen on radiography. We report herein a case of an affected toe in a patient with incontinentia pigmenti (IP).

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