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