Hot Cross Bun Sign Following Bilateral Pontine Infarction: A Case Report

Abstract

The hot cross bun sign is characterized by cruciform T2 signal hyperintensity in the pons and has been reported to be a specific but not pathognomic for multiple system atrophy. It reflects degeneration of pontine neurons and transverse pontocerebellar fibers, regardless of the underlying pathogenic process. Here, we report a case of hot cross bun sign following bilateral pontine infarction due to Wallerian degeneration of the pontocerebellar fibers.

Keywords

• Hot cross bun sign
• Pontine infarction
• Wallerian degeneration