From HPO
Finger syndactyly- MedGen UID:
- 65139
- •Concept ID:
- C0221352
- •
- Congenital Abnormality
Webbing or fusion of the fingers, involving soft parts only or including bone structure. Bony fusions are referred to as "bony" Syndactyly if the fusion occurs in a radio-ulnar axis. Fusions of bones of the fingers in a proximo-distal axis are referred to as "Symphalangism".
Triphalangeal thumb- MedGen UID:
- 66029
- •Concept ID:
- C0241397
- •
- Congenital Abnormality
A thumb with three phalanges in a single, proximo-distal axis. Thus, this term applies if the thumb has an accessory phalanx, leading to a digit like appearance of the thumb.
Broad thumb- MedGen UID:
- 140880
- •Concept ID:
- C0426891
- •
- Finding
Increased thumb width without increased dorso-ventral dimension.
Postaxial hand polydactyly- MedGen UID:
- 609221
- •Concept ID:
- C0431904
- •
- Congenital Abnormality
Supernumerary digits located at the ulnar side of the hand (that is, on the side with the fifth finger).
Preaxial hand polydactyly- MedGen UID:
- 237235
- •Concept ID:
- C1395852
- •
- Congenital Abnormality
Supernumerary digits located at the radial side of the hand. Polydactyly (supernumerary digits) involving the thumb occurs in many distinct forms of high variability and severity. Ranging from fleshy nubbins over varying degrees of partial duplication/splitting to completely duplicated or even triplicated thumbs or preaxial (on the radial side of the hand) supernumerary digits.