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Megalodactyly

MONDO:0007962

A condition in which a finger or toe is larger than normal size secondary to excessive growth of the anatomical structures or abnormal accumulation of substances.

Also known as: Megalodactyly, macrodactyly, somatic, (3), cerebral cavernous malformations 4, somatic, macrodactyly

1 clinical trial for this condition and its sub-types, 1 tagged with Megalodactyly itself.

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Part of

↑ Hereditary disease (18187) ↑ Disorder of development or morphogenesis (5170)

Including sub-types (1) Tagged with Megalodactyly (1)

Completed 1

New registry sheds light on rare overgrowth diseases

Knowledge-focused Completed

This completed study created a French national registry for people with rare overgrowth syndromes caused by PIK3CA gene mutations. Researchers collected medical and genetic information from 28 patients to better understand these conditions and estimate how many people are affecte…

Sponsor: Institut National de la Santé Et de la Recherche Médicale, France • Aim: Knowledge-focused

Last updated Jun 27, 2026 09:07 UTC

Megalodactyly

Where it sits in the disease tree

New registry sheds light on rare overgrowth diseases