Acoustic schwannoma - intracanalicular
Hearing loss and tinnitus in the right ear.
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Abnormal enhancing lesion measuring about 8 x 5 mm is seen in the right internal auditory canal involving the vestibulocochlear nerve suggestive of an intracanalicular vestibular schwannoma.
Note the presence of CSF lateral to the tumor.
This patient was a known case of multiple sclerosis for 7 years and was referred to us with a sudden onset of tinnitus and hearing loss on the right side. Based on the history and MRI findings, VIII nerve schwannoma is the first diagnosis.