Horner syndrome

What it means

An abnormality resulting from a lesion of the sympathetic nervous system characterized by a combination of unilateral ptosis, miosis, and often ipsilateral hypohidrosis and conjunctival injection.

Ptosis, miosis, and occasionally apparent enophthalmos and anhidrosis on one side of the face, loss of ciliospinal reflex and blood shot conjunctiva.

Rare diseases that can present with this3

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: Horner's syndrome · Oculosympathetic palsy