Presentation
Left tinnitus.
Patient Data
Age: 50 years
Gender: Female
From the case:
Vestibular schwannoma - intracanalicular
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A 3 mm rounded lesion is seen at the middle part of the left internal auditory canal seen originating from the vestibulocochlear nerve and abutting the facial nerve. It shows high signal intensity on T2 and couldn't be detected on coronal T2. It is best detected on axial CISS of the posterior fossa. It shows postcontrast enhancement.
Case Discussion
Features are in keeping with left small intracanalicular vestibular schwannoma. The lesion is considered grade I on Koos grading scale.
When this lesion is suspected, it is important for the study to be done with contrast and better with thin cuts heavy T2 sequence (CISS, FIESTA,..) for detection of the lesion as it is usually not apparent on usual MRI sequences.
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