HealthDay (3/30) reports, “Doctors may fail to detect precancerous growths if patients’ colons aren’t adequately cleansed before having a colonoscopy,” according to a study published in the journal Gastrointestinal Endoscopy. “Researchers identified 373 patients who underwent a colonoscopy between 2004 and 2009, and had inadequate bowel preparation. Of the 133 patients who later had a second colonoscopy, nearly 34 percent had at least one precancerous growth detected in the repeat screening.” Medscape (3/30, Barber) also covers the story.