Triphalangeal thumb
http://purl.obolibrary.org/obo/HP_0001199
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. [ PMID:19125433 HPO:probinson ]
Term info
- SNOMEDCT_US:205308004
- UMLS:C0241397
- MSH:C573898
hposlim_core
The requirement for a single PD axis relates to the issue that partial forms of Preaxial polydactyly may comprise a partially duplicated thumb with two distal phalanges and a single proximal phalanx. That finding is instead coded as a mild form of thumb polydactyly. Note that this finding can be readily assessed by examination and/or physical manipulation of the thumb.
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.
HP:0009619, HP:0006194, HP:0009610, HP:0005846
Digitalized thumb, Accessory phalanx of the thumb, Triphalangy of thumb, Finger-like thumb, Triphalangeal thumbs
HP:0001199