CT demonstration of the appendix in asymptomatic adults.

We prospectively examined 103 consecutive adults (67 women, 36 men; mean age: 58.7 years) referred for abdominal and pelvic computed tomography (CT) in whom there was no history of right lower quadrant symptoms or appendectomy. Contiguous 5-mm CT images through the pericecal region were obtained in each subject, once routine scanning was completed. Three radiologists reviewed all CT images and reached a consensus on appendiceal visualization and the quantity of intraperitoneal fat. Statistical methods were applied to the collected data to seek significant associations between a visualized appendix and the following factors: patient age, sex, intraperitoneal fat grade, and the presence of oral contrast in the cecal lumen. The appendix was definitely visualized in only 45 of the 103 patients (43.7%). Analysis of variance revealed no statistically significant correlation between a CT-demonstrated appendix and the four variables examined. The clinical implications of these findings are discussed.