Chest, Vol 76, 176-179, Copyright © 1979 by American College of Chest Physicians

ARTICLES

Diagnostic accuracy in peripheral lung lesions. Factors predicting success with flexible fiberoptic bronchoscopy

JR Radke, WA Conway, WR Eyler and PA Kvale

Ninety-seven consecutive peripheral lung lesions were evaluated by biplane fluoroscopically guided flexible fiberoptic bronchoscopy and analyzed to define features that predict diagnostic yield. The overall diagnostic accuracy was 56 percent (63 percent for malignant and 38 percent for benign lesions). The most important characteristic associated with a positive cyto- or histopathologic diagnosis was size of the lesion; the yield was 28 percent when the diameter was less than 2.0 cm compared to 64 percent if the diameter was greater than or equal to 2.0 cm (P = 0.0035). The diagnostic yield was similar for lesions located in the outer and middle third of the lung if the diameter was greater than 2.0 cm; inner one-third lesions were correctly diagnosed more frequently, related in part to the larger size of these lesions. There was no significant difference in diagnostic yield for the following: segmental location, greatest distance from carcina on either the posteroanterior or lateral radiograph, or radiographic characteristics of the lesion. We conclude that biplane fluoroscopically guided flexible fiberoptic bronchoscopy is a reasonable diagnostic procedure for peripheral lesions greater than or equal to 2.0 cm in diameter, but that alternative procedures should be used for lesions under 2.0 cm in diameter.

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