Rare diseases · Sign or symptom
Abnormal medulla oblongata morphology
HP:0011441
What it means
An abnormality of the medulla oblongata, the lower half of the brainstem.
The medulla oblongata, which is often referred to simply as the medulla, comprises the medullary reticular formation, inferior olivary complex and cochlear nuclear complex, among other structures.
Rare diseases that can present with this4
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: Abnormality of the medulla oblongata · Abnormality of the myencephalon
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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.