Neoplasm of unspecified behavior of unspecified site [D49.9], Reason for Study: ^Reason: eval s/p tumor resection History: s/p tumor resection Near total resection status of the posterior fossa mass through midline suboccipital craniotomy. Post surgical changes including blood products are seen at the resection sites with minimal surrounding edema.On post enhanced scan, there is focal patchy enhancing area especially around the area of the right inferior cerebellar peduncle and foramen Luschka (lateral aperture). These enhancement could represent small portion of residual mass but could also represent reactive changes or enhancing venous structure or choroid plexus. Follow up imaging is recommended for further clarification.Otherwise, there is no evidence of abnormal enhancement on the 4th ventricle wall where main portion of the tumor was seen.There is no evidence of acute ischemic lesion on this scan.Ventricle size is stable with air fluid level which indicate postoperative status. The midline structures and cranial-cervical junction are normal. Normal flow voids are identified in the major intracranial vessels. The paranasal sinuses and mastoid air cells are clear.
Post posterior fossa (4th ventricle) tumor near total resection status.Overall, there is no postoperative unusual finding.Subtle patchy enhancing area around the right 4th ventricular lateral aperture is seen. Follow up imaging appears to be needed to clarify the nature of the lesion.