Rare diseases · Sign or symptom
Hemifacial hypertrophy
Enlargement of half of face
HP:0005323
What it means
Unilateral overgrowth of facial tissues, including muscles, bones and skin.
Rare diseases that can present with this1
The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.
Part of the broader category
Also called: Facial hemihyperplasia · Facial hemihypertophy · Friedreich's disease · Hemifacial enlargement · Hypertrophy of half of face · Increase in size of half of face · Overgrowth of half of face
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Start free with EleplanThis page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.