 There is a complex multiseptated, multiloculated cyst measuring overall up to 15 x 26 mm in greatest axial dimensions and approximately 17 mm CC. The lesion is centered in the right basal ganglia and extends to the level of the anterior commissure. It is unchanged in size since the outside CT of 9/24/2015. It is of CSF signal intensity, with no restricted diffusion. There is no surrounding FLAIR abnormality or associated enhancement. There is minimal localized mass effect. There is no midline shift.
Nonenhancing complex CSF signal intensity cystic structure centered in the right basal ganglia with no surrounding abnormal signal and only minimal localized mass effect. The differential diagnosis includes primarily neuroglial cyst or large prominent peri-vascular space, less likely cryptococcal infection or cystic neoplasm. However, recommend obtaining the remote outside CT that was performed reportedly 45 days prior to the current study to assess for stability.