Camptodactyly is defined as a permanent flexion contrature of 1 or both fifth fingers at the proximal interphalangeal joints. Additional fingers might be affected, but the little finger is always involved. Usually the condition appears to be sporadic in a family, but clinical examination of relatives reveals that it is an autosomal dominant condition subject to incomplete penetrance and variable expressivity (summary by Malik et al., 2008). [from
OMIM]