Early Diagnosis of Acoustic Neuromas

摘要: 33 consecutive patients operated upon because of an at the ENT Department Acoustic neuroma University Zurich between 1969 and 1972 were investigated in order to find most suitable criteria for early diagnosis tumor. A unilateral progressive sensorineural hearing loss with or without tinnitus was first symptom acoustic 91% patients. The reliable diagnostic tests rated as follows: (1) caloric test, presenting a significantly reduced response affected side 94% cases abnormal directional preponderance nystagmus remaining patients; (2) conventional X-ray examination (Stenvers views polytomography), showing asymmetry internal auditory meatus instances; (3) meatocisternography, which confirms presence indicates precise extension tumor 90% cases; (4) CSF-protein, is increased above normal values 81 % cases, (5) audiometry, indicating retrocochlear lesion 55 Attention drawn fact that does not only mean detection its earliest stage development but also when it produces symptoms.