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Synostosis involving the 1st metacarpal

MedGen UID:
867039
•Concept ID:
C4021397
•
Anatomical Abnormality
Synonyms: First metacarpophalangeal joint synostosis; Fusion involving 1st long bone of hand; Symphalangism affecting the 1st metacarpal
 
HPO: HP:0009703

Definition

Fusion of the 1st metacarpal with another bone. In contrast to the proximal phalanges of the digits 2 to 5, the proximal phalanx of the thumb is embryologically equivalent to the middle phalanges of the other digits, whereas the first metacarpal is embryologically of phalangeal origin and as such equivalent to the proximal phalanges of the other digits. [from HPO]

Term Hierarchy

CClinical test,  RResearch test,  OOMIM,  GGeneReviews,  VClinVar  
  • CROGVSynostosis involving the 1st metacarpal

Conditions with this feature

Symphalangism, C. S. Lewis type
MedGen UID:
396126
•Concept ID:
C1861404
•
Disease or Syndrome
See: Condition Record
Symphalangism, C. S. Lewis type

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