[A clinical analysis for sudden sensorineural hearing loss with acoustic neurinoma]

Retrospectively analyzed the clinical data of sudden sensorineural hearing loss with acoustic neuroma.

The clinical data of 467 cases with sudden sensorineural hearing loss were collected between Jan, 2008 and Aug, 2012. Discussed the clinical data which were diagnosed as acoustic neuroma.

In 467 cases of sudden sensorineural hearing loss, nine cases were diagnosed as acoustic neuromas (9 ears, 1.93%), two males and seven females, with a age range of 28 to 57 years. Among them, seven cases accompanied with tinnitus, seven cases with vertigo. The hearing results in nine cases, two cases were found to be mild, two were moderate, four were severe, and one was profound hearling loss respectively. Hearing was classified into five types according to audiogram shape (1 of up-sloping, 1 of down-sloping, 2 of mid-frequency, 1 of profound loss, 4 of flat audiogram). Eight cases had abnormal ABR, nine cases with ear ipsilateral stapedius reflex were completely not elicited, seven cases with health ear contralateral stapedius reflex were completely not elicited. Tumors were graded by Koos Grades according to size (7 of grade I, 1 of grade II, 1 of grade IV). Seven small acoustic neuroma was taken waiting strategies. Meanwhile, we use glucocorticoid and improve the microcirculation of the inner ear medication short-termly for these patients. Four patients' hearing were improved.

The initial symptoms of some acoustic neuroma are sudden hearing loss, especially the small tumors in internal auditory canal. In order to prevent misdiagnosis, MRI and ABR should be performed as a routine test for sudden sensorineural hearing loss. It is necessary to give appropriate treatment to protecting hearing for the small acoustic neuroma patients whose first symptoms are diagnosed as sudden sensorineural hearing loss.