Right-sided hearing loss.
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There is an extra-axial abnormal signal (heterogeneous hypointense T1 and hyperintense T2 signals) mass lesion in the right CP angle measuring about 30*40*45 mm with extension into the internal auditory canal and heterogenous avid enhancement after contrast injection
The lesion is compressing and displacing the adjacent right cerebellar hemisphere, pons, medulla, and fourth ventricle with CSF cleft sign.
No perilesional edema is seen.
With regarding the clinical and imaging findings, acoustic schwannoma is the main diagnosis.