Clinico-statistical Studies on Acoustic Tumor Manifesting Sudden Deafness:A clinical observation and review of literature on acoustic neurinoma (Part V)

概要

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Thirteen cases of acoustic tumor manifesting sudden deafness(5 cases treated by the author and 8 cases reported in the literature) were investigated from the clinico-statistical standpoint.<BR>1) 6.4% of patients with acoustic tumor manitested sudden deafness as the initial symptom. In 4 of the 13 patients the onset of acoustic tumor was preceded by symptomsof a common cold. In 6 of the 13 patients vertigo was present as a concomitant symptom.<BR>2) Acoustic tumors manifesting sudden deafness often lacked charcteristic objective symptoms. The frequency of each symptom has been found to be comparable with the figures contained in the previous clinico-statistics on acoustic tumors.<BR>3) Establishment of crucial diagnasis was delayed in most of these cases, the tumors, accordingly constituted brain tumors, 2 cm or greater in diameter, when the treatment started.
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