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Table 3 Comparison of imaging studies for confirmation and site of perforation

From: 2017 WSES guidelines on colon and rectal cancer emergencies: obstruction and perforation

  Confirmation of perforation Site of perforation
Sensitivity Specificity Sensitivity Specificity
Abdominal plain X-ray 53% [30] 53% [30] NS NS
Abdominal US 92% [30] 53% [30] NS NS
Colonic enema NS NS NS NS
CT scan 95% [29] 90% [29] NS 90% [29]
  1. NS not stated
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