# Intra-axial Cortical-Based Tumour Presented as Homonymous Hemianopia in a Young Patient: A Diagnostic Dilemma

## TL;DR

A young patient with vision loss was found to have a rare brain tumor, presenting a challenge in diagnosis and treatment.

## Contribution

The paper presents a rare case of intra-axial cortical-based tumor causing homonymous hemianopia in a young adult.

## Key findings

- The patient exhibited left-homonymous hemianopia due to an intra-axial cortical-based tumor.
- Imaging confirmed the tumor, with differential diagnoses including PXA, ganglioglioma, and DNET.
- Conservative treatment and monitoring were chosen over immediate intervention.

## Abstract

Intra-axial cortical-based tumours are rare tumours affecting children and young adults. These tumours can be classified as either low-grade or high-grade, depending on their aggressiveness and rate of growth. We report a case of homonymous hemianopia secondary to an intra-axial cortical-based tumour in a young patient. A 26-year-old lady presented with bilateral blurring of vision for three weeks associated with a headache. Visual acuity was 6/6 in both eyes. Bilateral optic nerve functions were normal. The Humphrey visual field test showed left-homonymous hemianopia. A CT scan and MRI of the brain revealed an intra-axial cortical-based tumor. Differential diagnoses include pleomorphic xanthoastrocytoma (PXA), ganglioglioma, oligodendroglioma, and dysembryoplastic neuroepithelial tumour (DNET). The patient was treated conservatively and closely monitored through clinic follow-up.