The College notes that many patients who have polyps detected by CT colonography will still have to undergo complete colonoscopy. Researchers in the ACRIN trial found that as many as 12% to 17% of study participants screened by CTC would have to be referred for complete colonoscopy depending on the size threshold for reporting lesions in the colon. Of more significant concern, is that the researchers only reported growths in the colon 5 mm or larger, leaving unreported and therefore undetected an untold number of potentially high risk pre-cancerous growths. Read the ACG statement.
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