Brain Abscess MRI

A 50 yo male with headache and recent onset left sided weakness. 

This MRI study of Brain shows:
A right parietal space occupying lesion.
Lesion has a thick walls, peripheral enhancement along its wall of uniform thickness, central non enhancing necrotic core showing restricted diffusion on Dw images.
Marked T2 hyper intense perilesional vasogenic odema and mass effect.

Imaging wise DDs given were Abscess and Glioma.
Steriotactic biospy of lesion performed.
Histopathological diagnosis : Abscess.

Pyogenic Abscess MRI

A young male, admitted for recent onset seizures. 

On admission MRI

Description of findings:
A well defined focal lesion in left parietal sub cortical white matter, size ~45x35mm.
Lesion has thin T2 hypointense wall, intensely enhancing on post contrast T1 with a multi locularity, enhancement pattern is peripheral type due to enhancement along its wall, non enhancing necrotic core which is hyper intense T2 and shows restricted diffusion on Diffusion weighted images.
Marked perilesional T2 hyperintense vasogenic odema. Left lateral ventricle is compressed.
No significant mass effect.

Imagingwise Possible DDs: Abscess > Glioma.

Restricted diffusion goes in favor of an Abscess over Glioma.

Histopathology Report : Xanthogranulomatous inflammation, macrophages, granulation tissue with fibroblasts surrounding necrotic core  S/o Pyogenic abscess.

Related post :

Abscess MR Spectroscopy