Anomalies of radius and thenar
Radial ray anomalies (radial agenesis and hypoplasia in particular) are frequently syndromic: trisomy 18, Holt-Oram, TAR syndrome, Fanconi anemia, VACTERL.
The forearm is shortened and the wrist is radially deviated in radial aplasia/hypoplasia. The thumb is either absent or present as a rudimentary bud or nonfuncioning structure..The term radial club hand is also used.
Triphalangeal thumb — long thumb with three phalanges, either opposable or non-opposable because in one plane with the other fingers.
Anomalie radia, Edwardsův syndrom: Radius anomaly, Edwards' syndrome, Macro, autopsy (73636)
Talipomanus: Talipomanus, Macro, autopsy (73729)