OverviewExtra digits may be present as an isolated finding, or they may occur as part of a syndrome, in which case other abnormalities are usually present. The most common form of polydactyly is an extra little finger.
Update Date 12/4/2013
Updated by: Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Bethanne Black, and the A.D.A.M. Editorial team.