 There are postoperative findings related to right parietal craniotomy for resection of a subjacent tumor. There is unchanged encephalomalacia in the right parietal and temporal lobes with T2 hyperintensity surrounding the resection cavity as well as ex vacuo dilatation of the right atrium. There is no abnormal enhancement surrounding the resection cavity or elsewhere within the brain. There is a right parietal approach ventriculostomy catheter that courses through the right atrium and terminates immediately adjacent to and with mass effect upon the right hippocampal body. The hippocampi are otherwise symmetric and normal in appearance. There are multiple punctate foci of susceptibility effect in the region of the surgical bed compatible with blood products as well as multiple additional punctate foci of susceptibility effect within the bilateral hemispheric white matter. There are also additional punctate foci of susceptibility effect within the left frontal horn and the 4th ventricle that correspond to calcification on prior CT. Stability of some of these foci is difficult to determine due to differences in technique. There is no evidence of acute infarct. There is no midline shift or herniation. The major cerebral flow voids are intact. The skull and scalp soft tissues are unremarkable. There is sphenoid sinus mucosal thickening and bilateral maxillary sinus retention cyst.
1.Unchanged postoperative findings related to right parietal tumor resection without evidence of recurrence.2.A right parietal approach ventriculostomy catheter terminates immediately adjacent to and with mass effect upon the right hippocampal body. The shunted ventricles are unchanged in size and the hippocampi otherwise normal in appearance.3.Multiple bilateral supratentorial punctate foci of susceptibility effect may represent chronic microhemorrhages, cavernous malformations, or calcification. Stability is difficult to determine due to differences in technique. Additional intraventricular foci of susceptibility effect corresponding to calcification on prior CT and are of uncertain etiology.