Clinical History
A 61-years-old man whom is HIV positive has a history of psoriasis and CMV gastritis. MRI brain (Axial T1FLAIR, Axial T2W, Axial T1+Contrast, Sagittal T1+Contrast, Diffusion weighted, Perfusion weighted) was performed
Diagnosis:
Toxoplasmosis
Comment :
MR brain showed a mass measured at 2.0cm located at the left lentiform
nucleus. It is hypointense to normal brain parenchyma on both T1-weighted
and T2-weighted images, and shows ring nhancement after contrast
enhancement. Its margin is irregular with uneven thickness. Surrounding
oedmea with mild local mass effect is seen. The central bulk of the lesion
demonstrates increased diffusion on diffusion-weighted and hypoperfusion on
perfusion-weighted study. Multiple tiny enhancing nodules are also seen
superior to the mass on the sagittal scan, suggestive of satellite lesions.
The overall findings are compatible with cerebral toxoplasmosis..
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