# A Case of Dysembryoplastic Neuroepithelial Tumor in an HIV-Positive Adult: Diagnostic Lessons for Clinicians

## TL;DR

A rare brain tumor was diagnosed in an HIV-positive adult, emphasizing the need for expanded differential diagnosis and use of prior imaging in similar cases.

## Contribution

Presents a rare case of DNET in an HIV-positive adult, expanding diagnostic considerations for clinicians.

## Key findings

- A 57-year-old HIV-positive man was diagnosed with DNET after excluding infectious and malignant causes.
- Prior imaging and multidisciplinary input were crucial in confirming the diagnosis.
- The patient remained seizure-free and showed radiological stability over two years.

## Abstract

Dysembryoplastic neuroepithelial tumor (DNET) is a benign central nervous system neoplasm, usually diagnosed in pediatric patients with epilepsy. We describe a case of a 57-year-old man presenting with a first episode of generalized tonic-clonic seizure and subacute cognitive decline, in whom a multicystic right temporal lobe lesion was detected. Further workup led to a new diagnosis of human immunodeficiency virus (HIV) infection. Comprehensive investigations excluded infectious and malignant etiologies. Review of prior imaging, combined with multidisciplinary input, led to a diagnosis of DNET. Two-year follow-up confirmed radiological stability, and the patient remained seizure-free under antiepileptic treatment. This case highlights the importance of expanding the differential diagnosis of cerebral lesions in HIV-positive adults and utilizing prior imaging to guide clinical decision-making.