Rare diseases · Sign or symptom
Aplasia/Hypoplasia of the nasal septum
Underdevelopment of nasal septum
HP:0009935
What it means
Absence or underdevelopment of the nasal septum.
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: Ageneis of nasal septum · Failure of development of nasal septum
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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.