History of meningioma and CP angle epidermoid cyst. A lobulated, nonenhancing T2 hyperintense mass centered within the right CP angle cistern encasing the right vertebral artery and posterior-inferior cerebellar arteries is unchanged in size and measures 26 x 23 x 20 mm. Mass effect on the right middle cerebellar peduncle and brainstem is again noted. There is no associated diffusion restriction.The pituitary mass is unchanged in size compared to the prior examination measuring 16 mm in coronal series. The lesion encroached on the suprasellar cistern and abuts the undersurface of the optic chiasm, similar to prior.There is no acute intracranial hemorrhage or acute infarction. The ventricles are unchanged in size and configuration. There is no midline shift or herniation. Scattered nonspecific small white matter lesions are unchanged.
1. Stable mass centered within the right cerebellomedullary angle cistern, possibly representing an epidermoid.2. Stable pituitary mass, which is favored to represent a macroadenoma. 