Male, 48 years old, with history of anaplastic astrocytoma, now off all therapy, compare to prior outside hospital MRIs. Evidence of a small craniotomy is again seen at the high left parietal vertex related to partial resection of a lesion within the left superior frontal gyrus. A bubbly cystic and hemosiderin stained cavity in the superior frontal gyrus is unchanged, and T2 hyperintensity in the surrounding parenchyma has decreased, particularly when compared to the examination of 1/16/2015. A short curvilinear area of mild diffusion restriction along the lateral margin of the cavity is new from prior. An irregular nodule of enhancement within the cystic cavity has not significantly changed from the immediate prior examination. However, this nodule, and previously demonstrated rim enhancement of the cystic tissue, have decreased when compared to older studies. No new enhancement is seen within or adjacent to the cavity, or elsewhere in the brain.Mild ex vacuo dilatation of the left lateral ventricle is unchanged. The remainder of the brain is unremarkable. Ill-defined T2 hyperintensity along the left lateral ventricle likely represents a treatment related effect. No suspicious lesions are seen in the right cerebrum.
Findings are seen compatible with partial resection and subsequent treatment of a tumor within the left superior frontal gyrus. The size and morphology of a bubbly cystic cavity within the gyrus are not significantly changed. T2 hyperintensity surrounding the cavity has diminished when compared to prior examinations. A short curvilinear segment of restricted diffusion along the left lateral aspect of the lesion is new, but this is nonspecific and could reflect a treatment related effect. Attention on subsequent exams will be necessary. An enhancing nodule within the cavity is unchanged compared to the immediate prior study, possibly representing a combination of postoperative granulation and treated tumor. Enhancement in this region is in general reduced when compared to older exams.