Dr. Sara McCartney is a consultant gastroenterologist with special interests in general gastroenterology, ulcerative colitis, Crohn's disease, IBS, diverticular disease, bowel cancer screening, and adolescent gastroenterology. She is an accredited bowel cancer screening colonoscopist in the National Screening Programme and serves as an examiner in colonoscopic accreditation. Dr. McCartney has a subspecialty interest in inflammatory bowel disease, having studied inflammatory mechanisms in IBD for her PhD thesis. She is the chairman of the Adolescent and Young Person's section at the British Society of Gastroenterology. Dr. McCartney is also a consultant gastroenterologist at University College London, where she serves as the chairman of gastroenterology. Her areas of expertise include endoscopy, colonoscopy, and gastroenterology in young people.