نورینوم اکوستیک ردیابی شده بوسیله آزمون پاسخ برانگیخته شنیداری ساقه مغز: گزارش موردی

  “Acoustic Neuronoma” is a benign neoplasm situated in a critical place, so that one can say its behaviour looks like malignant tissues. Three frequent clinical symptoms are associated with tumor with different sensitivity and priority, including vertigo and imbalance, tinnitus and hearing loss. Presence of one or all of these symptoms does not make the definite diagnosis and differntial diagnosis possible with clinical and audiologic examinations, rather one should use more sophisticated methods for judgement about the origins of symptoms.   In this article a case of 8th cranial nerve lesion is reported that was detected by ABR and MRI confirmed the diagnosis of acoustic tumor. Also, two cases of cochlear hearing loss with clinical and audiological similarity and different ABRs with the persented case will be described.   The comparison will show the role of ABR as a low cost and high sensitivity test in differential diagnosis of 8th cranial never, conchlear and other peripheral lesions.