Double nail of the second toe: A case report with sonographic and radiological correlation.

Double toenail is a rare abnormality that usually affects the fifth toe. It is considered as an inherited condition that may represent an incomplete form of polydactyly. Underlying bone abnormalities should be ruled out. We present a case of a double toenail of the second toe, a location that has not previously been described, with underlying bone involvement noted on ultrasound and plain films.