Rare diseases · Sign or symptom
Hemifacial hypoplasia
Decreased size of half of the face
HP:0011332
What it means
Unilateral underdevelopment of the facial tissues, including muscles and bones.
Rare diseases that can present with this3
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: Decrease in size of half of face · Decrease in size of one side of the face · Decreased size of one side of the face · Hemifacial microsomia · Shrinking of half of face · Shrinking of one side of the 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.