Male, 72 years old, status post craniotomy for tumor resection. Postoperative findings are seen compatible with suboccipital craniotomy. A small amount of extra-axial fluid and trace blood product deep to the craniotomy flap are within expected limits. Scattered intracranial air is also an expected finding.A majority of the left aspect of the tumor and the tumor core has been resected. There is evidence of T1 hyperintense blood product within the central resection cavity. A rim of enhancement does, however, remain along the right margin of the resection bed.T2 hyperintensity remains evident surrounding the resection cavity with minimal involvement of the right midbrain. In addition, there is a small amount of rim restricted diffusion compatible with surgical change. The fourth ventricle remains partially effaced.No new enhancing lesions are seen. A nonspecific focus of T2 hyperintensity within the white matter adjacent to the left frontal horn is unchanged. No new parenchymal lesions are detected. Trace subdural blood product is suspected along the right tentorium. The lateral ventricles and the cerebral sulci are stable in size and morphology.
Expected findings are seen status post cerebellar tumor resection. A majority of the left and central aspects of the tumor has been included in the resection. There may be a rim of residual enhancing tumor along the right margin of the resection cavity. Edema in the surrounding parenchyma is relatively unchanged.