An inflammatory bowel disease that affects the large bowel. Also called microscopic colitis because there is no sign of inflammation on the surface of the colon during a colonoscopy.

A distinct signaling protein released by lymphocytes.

A test that takes pictures of the body

Conditions that occur when the small intestine cannot absorb nutrients from foods.

A tear in the lower end of the esophagus caused by severe vomiting.

A condition caused by not eating enough food or not eating a balanced diet.

Tests that measure muscle pressure and movements in the gastrointestinal tract.

A huge, swollen colon that results from several different conditions. In children, megacolon is more common in boys than girls. See Hirschsprung disease.

The way cells change food into energy after food is digested and absorbed into the blood.

The movement of food through the digestive tract.