Anal cancer forms in the anus, the opening to the rectum that controls the elimination of feces during bowel movements. Two sphincter muscles open and close the anus...


Barrett's esophagus is a condition in which normal cells that line the esophagus, called squamous cells, turn into specialized columnar cells, a rare cell type...


Next to gallstones, cancer is the most common cause of bile duct obstruction. The majority of bile duct cancers develop in the part of the ducts that are outside the liver and are sometimes referred to as extrahepatic tumors...


Cholecystitis is an inflammation of the gallbladder wall and nearby abdominal lining. Cholecystitis is usually caused by a gallstone in the cystic duct, the duct that connects the gallbladder to the hepatic duct...


Cirrhosis is the twelfth leading cause of death in the United States, according to the National Institute of Diabetes and Digestive and Kidney Diseases...


Because colon cancer and rectal cancers have many features in common, they are sometimes referred to together as colorectal cancer. Colorectal cancer is malignant cells found in the colon or rectum...


Constipation is a condition in which a person has uncomfortable or infrequent bowel movements. A person is considered to be constipated when bowel movements result in small amounts of hard, dry stool fewer than three times a week...


Crohn's disease is an inflammatory bowel disease (IBD) that is a chronic condition that may recur at various times over a lifetime. It usually involves the small intestine, most often the lower part called the ileum...


Diarrhea is defined either as watery stool, or increased frequency, or both, when compared to a normal amount. It is a common problem that may last a few days and disappear on its own...


In the colon, some people have small pouches that bulge outward through weak spots. Diverticular disease is an inflammation or infection in the pouches, known as diverticula, which are located in the colon: A single pouch is called a diverticulum...