Abstract
We reported a 15-years old male with vertigo, left tinnitus and left hearing loss due to a cyst of the left cerebellopontine angle. Chief complaint of the patient was recurrent attacks of vertigo, fluctuated left tinnitus and left hearing loss. A cystic lesion 5.0×5.0 mm in size was found in the left cerebellopontine angle by head MR images (MRI). The results of physiological tests, auditory evoked brainstem response (ABR), short increment sensitivity index test (SISI test) and stapedial reflex (SR) reviewed labyrinthine deafness. Smooth pursuit eye movement test (ETT) and opto kinetic nystagmus test (OKN) did not show any central abnormal findings.The cyst of the cerebellopontine angle was assumed to compress the vestibulocochlear nerve or labyrinthine artery in this case.
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