Non-Hodgkin’s Lymphoma of the Middle Ear Presenting as Mastoiditis

Figure 3

MRI of cerebellopontine angles and posterior fossa (coronal cut). Opacification of the left mastoid air cells and middle ear cavity with soft tissue signal which elicits low signal in T1WI and high signal in T2WI with restricted diffusion in DWI. There is homogeneous enhancement following IV contrast administration. No evidence of adjacent intracranial abscess formation or sinus thrombosis. The region of brain stem and cerebellar hemispheres are normal. No focal lesions are seen. Both the VII and VIII cranial nerves show normal course and signal intensity. No intra- or extra-canalicular enhancing lesion is seen.