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Review: the use of computed tomographic scanning has high sensitivity, specificity, and accuracy for diagnosing acute appendicitis in adults

MAIN RESULTS 23 studies used prospective designs to address the diagnostic accuracy of CT scanning. In these studies, the numbers of patients ranged between 31 and 308. CT features used to diagnose acute appendicitis included appendiceal diameter .6 mm with periappendiceal inflammation, non-opacification with oral or rectal contrast material with periappendiceal inflammation, or the presence of an appendicolith. In all studies, the diagnostic standard was pathological diagnosis if the patient had an appendectomy or prolonged follow up (usually 3 mo) if the patient did not have an appendectomy. Studies reported that the sensitivity of CT scanning ranged from 77–100%, the specificity ranged from 83–100%, and the accuracy ranged from 88–98% for the diagnosis of acute appendicitis in adult men and women.