Excessive gas in the stomach or intestine that can cause bloating and flatus.

An operation to remove part or all of the stomach.

All the DNA contained in an organism or a cell, which includes both the chromosomes within the nucleus and the DNA in mitochondria.

Medicines that reduce the amount of acid the stomach. Histamine2 (H2) signals the stomach to make acid.

A virus that occurs mostly in people who share needles with infected people. Only people who have hepatitis B can get hepatitis D.

A test for lactose intolerance that measures breath samples for hydrogen levels. The body makes too much hydrogen when lactose is not broken down properly in the small intestine.

Transmitted through genes from parents to offspring.38

A plant-derived adhesive used in ostomy appliances.

A feeling of fullness in the anus and rectum with occasional pain caused by muscle spasms.

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