Congenital Curved Nail of the Fourth Toe Associated with Oral Disorders.

Congenital curved nail of the fourth toe represents an unusual deformity in which the nail of the fourth toe curves in a plantar direction. It is unknown why only this toe is affected; however, the initial descriptions suggest that this is a mesodermal defect. We describe a case of congenital curved nail of the fourth toe associated with bifid uvula. There are only 2 reports mentioning the association of this nail abnormality with cleft palate and/or lip. In our patient, there was an association with bifid uvula that is considered a minor form of palatine fissure. There seems to be an association of congenital curved nail of the fourth toe with cleft palate to different degrees; however, the pathogenesis of the deformity remains unknown.