Familial Koilonychia

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Abstract
Koilonychia, or spoon nails, is a relatively uncommon disorder in which the nails are abnormally thin and concave, from side to side, with the edges turned up. Single or multiple fingers and/or toes may be involved. To our knowledge, the case presented herein is unique in that we describe a pedigree of four generations in which the propositus and several relatives demonstrate koilonychia, involving not only all fingernails, but also all toenails. This degree of expressivity, in addition to the sparse number of pedigrees previously published, prompted this report. Report of a Case A healthy 13-year-old boy was seen in the Dermatology Clinic, Keesler USAF Medical Center, Miss, for evaluation and treatment of verrucae involving the dorsal aspects of both hands. He was otherwise in good health, with no orthopedic or other ectodermal abnormalities. During his clinic visit, it was also noted that he had notable concavity of all his

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