Neoplasm of uncertain behavior of brain, unspecified [D43.2], Reason for Study: ^Reason: preop planning for craniotomy for tumor History: n/a- preop planning Multiple fiducial markers were attached on scalp.Re-demonstration of irregularly enhancing posterior fossa mixed solid and cystic mass which compresses 4th ventricle.The size, enhancing pattern and the degree of mass effects as well as the degree of ventriculomegaly do not show any significant interval change since prior scan.Normal flow voids are identified in the major intracranial vessels. The paranasal sinuses and mastoid air cells are clear.
Pre-operative MR imaging with fiducial markers were performed.No interval change in terms of posterior fossa mass size, MR characteristics, mass effects and the degree of ventriculomegaly since prior scan.