Presentation
Left tinnitus.
Patient Data
Age: 60 years
Gender: Female
From the case:
Vestibular schwannoma - intracanalicular
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Left-sided small intracanalicular lesion at porus acousticus with avid post-contrast enhancement. Axial thin cuts heavy T2 sequence (CISS) shows the lesion is continuous with the vesibulocochlear nerve (VIII), in keeping with vestibular schwannoma.
Case Discussion
As regards the location of the lesion, differential diagnosis includes intracanalicular acoustic schwannoma and meningioma. The continuity of the lesion with vestibulocochlear nerve (VIII) is in keeping with acoustic schwannoma. High resolution thin T2 sequence (e.g. CISS) is needed to detect small intracanalicular acoustic schwannomas which may be missed on conventional images.
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