Circumferential toenail.

Congenital deformities occur in approximately 1% of all live births. The exact incidence of congenital foot deformities is unknown. The presence of a circumferential nail of the toe is a very rare deformity. In our review of the literature, we have encountered only two previously reported cases of circumferential toenails. In these cases the patients were siblings and also had circumferential fingernails. This report describes circumferential toenails without other hand or other congenital deformities.