Chronic loss of joint motion in the 5th finger due to structural changes in non-bony tissue. The term camptodactyly of the 5th finger is used if the distal and/or proximal interphalangeal joints are affected.
Passive dorsiflexion of the 5th finger more than 90 degrees
Postaxial hand polydactyly +
Subluxation of the proximal interphalangeal joint of the little finger