"Presenting symptoms " ( initial concern that brings a patient to a doctor ) of a lesion of the nervus vestibulocochlearis due to a tumour in the region of the cerebello-pontine angle are the following : hearing loss ( 98 % ), tinnitus ( 70 % ), dysequilibrium ( 67 % ), headache ( 32 % ), facial numbness and weakness ( 29 % and 10 % respectively ).