Which condition encompasses both ulcerative colitis and Crohn's disease?

• A. Irritable bowel syndrome (IBS)
• B. Enteritis
• C. Inflammatory bowel disease (IBD)
• D. Diverticulitis

Answer: (C)

Understanding how inflammatory disorders of the GI tract are categorized helps you see the common thread between these conditions. Both ulcerative colitis and Crohn's disease are chronic inflammatory problems of the intestine, grouped under inflammatory bowel disease. This umbrella captures disorders where inflammation of the digestive tract is central, unlike irritable bowel syndrome, which is a functional problem without mucosal inflammation. Enteritis refers to generic intestinal inflammation, often acute and infectious, and diverticulitis is inflammation of diverticula in the colon—neither name covers both ulcerative colitis and Crohn's disease. So the best answer is inflammatory bowel disease, the label that encompasses both conditions.