Synonyms: Supernumerary phalanges | Supernumerary phalanx
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.
Data from Orphanet are used to provide information on a disease's name, synonym(s), and overview. Reference: Access aggregated data from Orphanet at Orphadata. Orphadata: Free access data from Orphanet. © INSERM 1999. Available on http://www.orphadata.org. Data version May 2026
Newly diagnosed with
Hyperphalangy?
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Advocacy Organizations
Uganda Alliance of Patients Organization
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Clinical Trials
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