A rare condition (OMIM:186400) characterised by carpal and tarsal synostoses (coalition), radial-head subluxation, aplasia or hypoplasia of middle phalanges, and metacarpophalangeal synostoses.
The most recent report in peer-reviewed literature was in 1966 (Clin. Orthop. 47: 173-176, 1966), pre-dating the sequencing of the human genome. The defective gene has not been identified.
Synonyms Calcaneonavicular coalition, carpal and tarsal colation, massive familial tarsal synostosis, multiple synostosis disorder, synostosis—tarsal—carpal—and digital, multiple synostoses syndrome (in part)