Rare diseases · Sign or symptom
Brown anomaly
HP:0031622
What it means
An ocular motility defect where the affected eye(s) does not elevate in adduction but has full depression in adduction. It can be congenital or acquired from injury to or defect of the superior oblique tendon or trochlea and has a positive forced duction test result.
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: Brown syndrome
Tracking symptoms like this for someone? Eleplan keeps symptoms, diagnoses, medications and every specialist in one plan.
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.