Horner syndrome
Findings
No curated finding names Horner syndrome yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
Horner's syndrome is a rare condition characterized by miosis (constriction of thepupil), ptosis (drooping of the upper eyelid), and anhidrosis (absence of sweating of the face). It iscaused by damage to the sympathetic nerves of the face. The underlying causes of Horner's syndrome vary greatly and may include a tumor, stroke, or other damage to a part of the brain called the brain stem; injury to the carotid artery;and trauma to the brachial plexus. In rare cases, Horner's syndrome is congenital (present from birth) and associated with a lack of pigmentation of the iris (colored part of the eye). Treatment of Horner's syndrome depends on the underlying cause.
Definition from the Mondo Disease Ontology (MONDO:0001294), read 2026-09-29. CC BY 4.0.
Where it sits
- A kind of
- Narrower terms (1)
Other names
1 name
Resolves to: Horner syndrome
- Also called
- Horner's syndrome