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Table 2 Comparison of imaging studies for confirmation, cause and site of LBO

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

  Confirmation of LBO obstruction Cause of LBO Site of LBO
Sensitivity Specificity Sensitivity Specificity Sensitivity Specificity
Plain X-ray 74–84% [26] 50–72% [26, 211, 212] 0 7% [212] 0 60% [212]
Abdominal US 88% [211] 76% [211] 0 23% [212] 0 70% [212]
Colonic enema 96% [26] 98% [26] 0 96% [26] 96% [26] 98% [26]
CT scan 93–96% [212, 213] 93–100% [212, 213] 0 66–87% [212, 214] 95% [213] 90–94% [29, 213]