Reason: Right temp lobe cystic lesion. Eval for change History: none- surveillance There is been no significant interval change in the appearance of a nonenhancing oval CSF signal intensity cystic lesion involving the mesial right temporal lobe, just superior to the hippocampus. It currently measures 8 x 17 mm in greatest axial dimensions on 801/14, x 6 mm CC on 701/15, compared to previous comparable measurements of 8 x 16 x 6 mm on the baseline exam. There is again a minimal rim of T2/FLAIR hyperintensity, predominantly anteriorly.The ventricles and sulci are within normal limits. The cisterns remain patent. There is no midline shift or mass effect. There is a stable punctate focus of nonspecific T2/FLAIR hyperintensity in the left superior frontal gyrus white matter posteriorly. There are no new areas of abnormal signal or pathological enhancement. There is no diffusion abnormality. No extra-axial fluid collection is identified. Normal flow-voids are demonstrated in the major intracranial vascular structures. The midline structures and craniocervical junction are within normal limits. There is mild mucosal thickening in the left maxillary sinus.
Continued stable appearance of nonenhancing cystic lesion in the mesial right temporal lobe, just superior to the hippocampus with minimal marginal FLAIR abnormality. The differential diagnosis is unchanged.