Comparison of Computer Tomography and Translabyrinthine Surgery in the Assessment of Acoustic Neurinoma

Abstract
In a series of 53 acoustic neurinomas removed by translabyrinthine surgery, measurement technique focused on maximum tumor size estimated with computed tomography (CT) compared with maximum size determined at surgery. Fifty-three tumors varying in size and location were evaluated. Ten small tumors not found with initial CT were identified at CT revision. Of the 34 % which could not be seen with CT, all but two were less than 15 mm in diameter, indicating a lower limit for CT detection of 15 mm.