A Case of Intravestibular Lipoma Presenting with Sudden Hearing Loss / 대한이비인후과학회지

Intracranial lipomas are unfrequent tumors developed from mesenchymatous cells. The corpus callosum is the most frequent location (50%) in the intracranial regions, and these tumors are rarely present in the cerebellopontine angle, the internal acoustic meatus, or intravestibular lesions. With a review of literature, authors report a rare case of the left-sided intravestibular lipoma presented as sudden hearing loss in 17-year-old female. Furthermore, differential diagnostic magnetic resonance imaging characteristics of lipomas are discussed in detail.

A newmethod to analyze the subjective visual vertical in patients with bilateral vestibular dysfunction

OBJECTIVE: The aim of this study was to assess the subjective visual vertical in patients with bilateral vestibular dysfunction and to propose a new method to analyze subjective visual vertical data in these patients. METHODS: Static subjective visual vertical tests were performed in 40 subjects split into two groups. Group A consisted of 20 healthy volunteers, and Group B consisted of 20 patients with bilateral vestibular dysfunction. Each patient performed six measurements of the subjective visual vertical test, and the mean values were calculated and analyzed. RESULTS: Analyses of the numerical values of subjective visual vertical deviations (the conventional method of analysis) showed that the mean deviation was 0.326±1.13º in Group A and 0.301±1.87º in Group B. However, by analyzing the absolute values of the subjective visual vertical (the new method of analysis proposed), the mean deviation became 1.35±0.48º in Group A and 2.152±0.93º in Group B. The difference in subjective visual vertical deviations between groups was statistically significant (p,<0.05) only when the absolute values and the range of deviations were considered. CONCLUSION: An analysis of the absolute values of the subjective visual vertical more accurately reflected the visual vertical misperception in patients with bilateral vestibular dysfunction.