Rare diseases · Sign or symptom

Diastomatomyelia

HP:0100563

What it means

Coexistence of two hemicords, at variable levels, causing splaying of the posterior vertebral elements. Results in neurological deficits in lower limb or perineum.

Rare diseases that can present with this2

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

Diastomatomyelia

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This 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.