Rare diseases · Sign or symptom
Aplasia/Hypoplasia of the middle ear
Absent/small middle ear
HP:0008773
What it means
Aplasia or developmental hypoplasia of all or part of the middle ear.
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: Absent/underdeveloped middle ear · Hypoplastic/aplastic middle ear structures · Middle ear hypoplasia/aplasia
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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.