Correlating the cochleovestibular deficits with tumor size of acoustic neuroma
Journal
Acta Oto-Laryngologica
Journal Volume
128
Journal Issue
7
Pages
756-760
Date Issued
2008
Author(s)
Abstract
Conclusion. The tumor size of acoustic neuroma correlates with cochleovestibular deficits. Those tumors with global frequency hearing loss, bilateral gaze nystagmus, or absent caloric and VEMP responses may indicate a tumor size >2.5 cm. Objective. This study aimed to investigate the correlation between cochleovestibular deficits and the size of acoustic neuroma. Patients and methods. A total of 44 patients with acoustic neuroma were enrolled in this study. Pure tone audiometry, electronystagmography, caloric test, vestibular evoked myogenic potential (VEMP) test, and MRI were conducted. Results. There is a trend of correlation between tumor size and audiographic configuration, with small-sized tumor in normal and rising types, medium-sized tumor in mid- and high-frequency hearing loss, and large-sized tumor in flat and deafness types. Five patients with bilateral gaze nystagmus had significantly larger tumor size than those without nystagmus. When 1 and 0 are used to represent abnormal and normal responses, respectively, the relationship between tumor size and vestibular function can be expressed as: tumor size (cm)=1.43 (caloric response)+1.35 (VEMP response), indicating that the estimated tumor size for those with abnormal caloric or VEMP responses increased by 1.43 or 1.35 cm, respectively. ? 2008 Taylor & Francis.
Subjects
Acoustic neuroma; Audiogram; Caloric test; Vestibular evoked myogenic potential (VEMP); Vestibular schwannoma
SDGs
Other Subjects
acoustic neurinoma; adult; article; audiography; auditory canal; caloric vestibular test; clinical article; controlled study; electronystagmography; female; hearing impairment; hearing loss; human; male; nuclear magnetic resonance imaging; nystagmus; priority journal; pure tone audiometry; symptomatology; tumor volume; vestibular function; vestibulocochlear nerve; Adult; Aged; Aged, 80 and over; Audiometry; Cochlea; Diagnosis, Differential; Electronystagmography; Evoked Potentials; Female; Hearing Loss; Humans; Magnetic Resonance Imaging; Male; Middle Aged; Neuroma, Acoustic; Nystagmus, Optokinetic; Ocular Motility Disorders; Prognosis; Severity of Illness Index; Vestibular Function Tests; Vestibule, Labyrinth
Type
journal article