Clinical question: evaluate tumor. Signs and symptoms: Ataxia Enhanced CT of brain:Examination demonstrate a low attenuation mass in the left cerebellum with significant mass-effect on the fourth ventricle however made no complete collapse of the ventricle. The mass appears to be partially within the fourth ventricle and left lateral recess of the fourth ventricle. There is only questionable subtle enhancement of this mass along its anterior aspect which projects into the left cerebellopontine angle.There is evidence of remodeling of the Petrus bone on the left at the level of its contact with the mass. This is best appreciated on axial image 6 on bony density. This appearance is suggestive of long-standing presence of mass at this location. For better characterization of this mass an MRI exam is recommended.Images through supratentorial space are essentially within normal limits. The ventricular system remain within normal size. There is no abnormal enhancement.
Left inferior cerebellar partially enhancing tumor measuring approximately 36 x 40 mm in transaxial dimensions. Severe mass effect on the fourth ventricle without resultant hydrocephalus. There is mass causes bony remodeling of the petrous bone on the left. Findings were discussed with the referring clinical physician Dr. Sophia Shakur at the time of review of study.