# Suprasellar pilocytic astrocytoma with leptomeningeal dissemination

## TL;DR

This paper describes a rare case of a low-grade brain tumor spreading to the meninges without becoming more aggressive over time.

## Contribution

The novelty lies in documenting leptomeningeal dissemination in a WHO Grade I suprasellar pilocytic astrocytoma without tumor upgrading.

## Key findings

- Leptomeningeal nodules progressed over time without evidence of tumor upgrading.
- The tumor remained classified as WHO Grade I despite dissemination.
- This case adds to the growing literature on rare manifestations of pilocytic astrocytoma.

## Abstract

Leptomeningeal dissemination is a rare manifestation of pilocytic astrocytoma. It may occur with higher-grade tumours like medulloblastoma, ependymoma and high-grade glioma, but is extremely rare with low-grade glioma. There has been a growing number of reported cases documenting leptomeningeal dissemination of pilocytic astrocytoma in the medical literature.

Description of a World Health Organization (WHO) Grade I suprasellar pilocytic astrocytoma with leptomeningeal dissemination in the brain and spinal cord which showed progression of the leptomeningeal nodules without tumour upgrading on long-term follow-up.