Hyperphalangy

Hyperphalangy is a congenital, non-syndromic limb malformation characterized by the presence of an accessory phalanx between metacarpal/metatarsal and proximal phalanx, or between any two other phalanges of a digit, excluding the thumb. Hypherphalangy is almost always bilateral and patients present no more than five digits and no other skeletal anomalies.

Short hallux

Underdevelopment (hypoplasia) of the big toe.


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PMID (PMCID)
8484405
 MALE
Index finger hyperphalangy and multiple anomalies: Catel-Manzke syndrome?
Wilson GN, King TE, Brookshire GS.
Am J Med Genet. 1993;46(2):176-9.
We describe a boy with short stature, developmental delay, unusual face, right iris coloboma, malformed ears, micrognathia, and skeletal anomalies including hyperphalangy of the index fingers, bilateral fifth finger clinodactyly, short halluces, and scoliosis.