Neoplasm of unspecified behavior of brain [D49.6], Reason for Study: ^Reason: pre op to use for navigation History: planning left suboccipital craniotomy for resection of cerebellar tumor The purpose of this imaging scan is preoperative localization using STEALTH protocol.Multiple fiducial markers attached on the scalp.There is a large [51.5 mm(RL) x 39.4 mm(AP) x 33 mm(CC)] posterior fossa likely extra axial mass with mass effect toward the left cerebellar hemisphere. The fourth ventricle appears to be deformed due to mass effect, with a slightly prominent ventricular system.Normal flow voids are identified in the major intracranial vessels. The paranasal sinuses and mastoid air cells are clear.
51.5 mm(RL) x 39.4 mm(AP) x 33 mm(CC) sized left side posterior fossa likely extra axial mass with mass effects. 