Magnetic Resonance Imaging Features of Cerebral Ring-Enhancing Lesions with Different Aetiologies

Abstract

BACKGROUND Cerebral ring-enhancing lesions are defined as an area of hypodensity (in computed tomography) or hypointensity (in magnetic resonance imaging [MRI]) of brain tissue surrounded by a rim of enhancing tissue after contrast injection. Presentation of diseases varies depending on the site and extent of brain involvement and the aetiology. It is always important to correlate clinical symptoms and any previous imaging as the same imaging appearance can suggest vastly different aetiologies with variation in disease presentation. The aetiologies of cerebral ringenhancing lesions grossly include infectious, neoplastic, post-treatment, demyelinating, and vascular causes. A series of cases with definitive diagnosis based on clinical, microbiological, or pathological evidence were retrieved from our hospital database and their radiological images reviewed. Multiple aetiologies of cerebral ringenhancing lesions will be discussed. Imaging features will mainly focus on those shown on MRI.

Magic Dr.T? Tuberculous brain lesions in an immunocompetent patient-A case report

“…Entities within the “MAGIC DR” mnemonic, was considered for the cerebral ring enhancing lesions [ 4 ]. Of these, metastases and glioblastoma multiforme seemed most fitting because of multiplicity, grey-white matter junction location, marked vasogenic edema as well as the absence of internal restricted diffusion.…”