# Pachymeningitis With Dural Vessel Dilatation in MOG Antibody–Associated Disease: A Case Report

## TL;DR

A case report describes a rare manifestation of MOG antibody-associated disease involving pachymeningitis and dural vessel dilation, which improved with hormone therapy.

## Contribution

This case expands the known imaging features of MOGAD by highlighting pachymeningitis with dural vessel dilation.

## Key findings

- Pachymeningitis with dural vessel dilation was observed in a patient with MOGAD.
- The condition improved significantly after hormone therapy.
- This case broadens the imaging spectrum of MOGAD.

## Abstract

Myelin oligodendrocyte glycoprotein (MOG) antibody–associated disease (MOGAD) is a novel inflammatory demyelinating disorder marked by heterogenous clinical and radiological manifestations. Pachymeningitis is a rare manifestation.

An 18-year-old male was hospitalized with fever, dizziness, altered consciousness, and seizure attacks. Serum testing was positive for MOG antibodies. Diffuse pachymeningitis with prominent dural vessel dilation was observed prior to treatment, which markedly improved after hormone therapy.

MOGAD pachymeningitis with dural vessel dilatation broadens the imaging spectrum of MOGAD.