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A Study of Five False-Positive Results

LTC David M. Barrs, MC, USAF; William M. Luxford, MD; Terry S. Becker, MD; Derald E. Brackmann, MD

Arch Otolaryngol. 1984;110(8):535-537.

Abstract
• Cranial computed tomography (CT) with gas cisternography is reported to be the most accurate method of detection of small acoustic tumors. However, five false-positive CT results experienced in three years are now reported. This is a false-positive rate of 22% for tumors with less than 5-mm protrusion into the cerebellopontine angle, and a false-positive rate of 50% for tumors with less than 2-mm protrusion. A false-positive result is suspected if no mass protrudes at the porus or if gas enters the lateral internal auditory canal.

(Arch Otolaryngol 1984;110:535-537)

Author Affiliations
From the Otologic Medical Group, Inc, Los Angeles (Drs Barrs, Luxford, and Brackmann); the Department of Otolaryngology, Wilford Hall, US Air Force Medical Center, San Antonio, Tex (Dr Barrs); and the Department of Radiology, University of Southern California School of Medicine, Los Angeles (Dr Becker).

Footnotes
Accepted for publication Aug 29, 1983.

Reprint requests to 2122 W Third St, Los Angeles, CA 90057 (Dr Luxford).

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