This 35 year old man began having headaches eight months previouslsy.
A CT scan was unremarkable.
Two months prior to the current studies, he underwent brain biopsy, after
progressive symptoms led to MR imaging. A low grade glioma was found, and
he was treated with radiation.
The MR demonstrates an area of mixed signal intensity on
proton density (PD) and T2-weighted (T2) images in
a left occipital region. Contrast enhancement shows the lesion to
contain cystic elements. Thallium images show an anterior border of high
uptake, consistent with a small region of tumor recurrence.
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