Camptodactyly
| Classification according to ICD-10 | |
|---|---|
| M20.0 | Acquired deformities of the fingers and toe |
| Q74.0 | Other congenital malformations of the upper extremity (s) and shoulder girdle |
| ICD-10 online (WHO version 2019) | |
The camptodactyly is a flexion contracture of the middle joints of the little finger , more rarely, the ring finger.
It occurs when the proximal phalanx closest to the body is overstretched towards the back of the hand and creates the image of a hammer finger due to the associated angling of the remaining phalanges towards the palm .
The cause of the finger contracture is unknown. A shortening or shrinking of tendons and tendon sheaths is discussed as a possible etiology . A change in tendon structure similar to Dupuytren's disease has not been proven in any study.
The camptodactyly occurs sporadically or trauma, but it can also autosomal - dominant inherited. The hereditary form of camptodactyly is mostly congenital and bilateral and is sometimes associated with multiple fingers ( polydactyly ) and hammer toes .
It is often a feature of certain genetically determined syndromes , such as Stüve-Wiedemann syndrome , Reardon-Hall-Slaney syndrome , Rossi syndrome , Rozin syndrome , Down syndrome (trisomy 21), Zellweger syndrome Syndrome , Juberg-Marsidi syndrome, or trisomy 8 .
