# Raeder's Syndrome: An Uncommon Cause of Partial Horner Syndrome Secondary to Petromastoid Inflammation

## TL;DR

A 58-year-old woman's partial Horner syndrome was caused by petromastoid inflammation, a rare condition known as Raeder's syndrome.

## Contribution

This case report highlights Raeder's syndrome as a rare but treatable cause of partial Horner syndrome.

## Key findings

- The patient exhibited clinical and radiological features consistent with Raeder's syndrome.
- Early recognition of this condition is crucial for effective treatment.

## Abstract

We report the case of a 58-year-old woman who initially presented with left-sided headache, facial discomfort, and a partial Horner syndrome affecting her left eye. Imaging revealed inflammatory changes within the petromastoid air cells, consistent with petrous apicitis. The clinical and radiological features were aligned with Raeder's syndrome, the rare cause of painful partial Horner syndrome.

This case highlights the importance of early recognition of this uncommon but treatable medical condition.