A 79-year-old man was referred for CT colonoscopy (CTC) following optical colonoscopy. Unusually, the request was not due to an incomplete optical colonoscopy. The patient was referred because the gastroenterologist had identified a large polyp for resection but was unable to identify its exact location and secure it for resection during the optical procedure.
What abnormality accounts for the gastroenterologist's difficulty
in identifying the polyp's location?
Case Study Link: Hide and Seek—CT colonoscopy solves the riddle