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Causes of False Positive Interpretations at CTC
| Retained (untagged) fecal material |
| Thickened or complex folds |
| Non-neoplastic anorectal lesions |
| Ileocecal valve variants |
| Inverted appendiceal stump |
| Imaging artifacts |
| Non-neoplastic polyps |
| Submucosal and extrinsic lesions |
Note that some items on this list overlap with causes of missed lesions
