LIVING ART ENTERPRISES, LLC / SCIENCE PHOTO LIBRARY LIVING ART ENTERPRISES, LLC / SCIENCE PHOTO LIBRARY
This axial (cross sectional) T1 weighted MRI image of the brain performed without intravenous contrast shows a mass-like region of decreased signal (looks darker) in the deep right basal ganglia region of the right (on your left) cerebral hemisphere. This alone is a non-specific appearance but when it occurs in immunosuppressed people such as those with AIDS should be suspicous for lymphoma.
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