Legend Left: Axial NECT shows a large extra-axial hyperdense mass occupying the right cerebello- pontine angle and the right middle fossa with a zone of surrounding vasogenic edema in the adjacent brain parenchyma and mass effect on the pons. It appears to have a broad contact with the dura. Right: Axial CECT shows intense homogeneous enhancement.

Legend Left: Axial CECT with bone window reveals widening of the right facial nerve canal anteriorly. Also note the focal erosion of the petrous bone anteriorly, with soft tissue density projecting into the epitympanic recess. Opacified right mastoid air cells. Right: Axial T2WI shows that the mass in the right cerebellar pontine angle and middle fossa is heterogeneous with regions of T2 hypointensity and iso-intensity to gray matter. Possible extension into the internal auditory canal.

Legend Left: Axial T2WI shows the bilobed T2 hypointense mass with vasogenic edema in the adjacent brain parenchyma. Right: Sagittal T1WI shows subtle regions of peripheral hyper T1 intensity in the mass, likely representing regions of hemorrhage.

Legend Post contrast Coronal and Axial images show somewhat heterogeneous enhancement of the mass and the dura adjacent to the mass, as well as within the IAC, confirming the extension of tumor into the right internal auditory canal. Key words: mri ct tumor CP angle neoplasia temporal bone cranial nerve

Brain & ENT Diagnosis: Lymphoma of 7th cranial nerve