If data from the United Kingdom reflect practice patterns in the United States, endoscopists may be overlooking cases of microscopic colitis. A retrospective study of more than 10,000 colonoscopies conducted in the UK ssshowed that over 8% of endoscopists did not take biopsies in patients with chronic diarrhea undergoing colonoscopy, while in 24% of cases, they biopsied only the rectum, which is not adequately sensitive for diagnosing microscopic colitis.
Inadequately obtaining biopsies can lead