Glossary R

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Radiation Colitis (ray-dee-AY-shun koh-LY-tis)
Damage to the colon from radiation therapy.

Radiation Enteritis (ray-dee-AY-shun en-tuh-RY-tis)
Damage to the small intestine from radiation therapy.

Radionuclide Scans (RAY-dee-oh-NOO-clyd skanz)
Tests to find GI bleeding. Radioactive material is injected to highlight organs on a special camera. Also called scintigraphy (sihn-TIHG-ruh-fee).

Rapid Gastric Emptying (RAH-pid GAH-strik EM-tee-ying)
See Dumping Syndrome.

Rectal Manometry (REK-tul muh-NAW-muh-tree)
A test that uses a thin tube and balloon to measure pressure and movements of the rectal and anal sphincter muscles. Usually used to diagnose chronic constipation and fecal incontinence.

Rectal Prolapse (REK-tul PRO-laps)
A condition in which the rectum slips so that it protrudes from the anus.

Rectum (REK-tum)
The lower end of the large intestine, leading to the anus.

Reflux (REE-fluks)
A condition that occurs when gastric juices or small amounts of food from the stomach flow back into the esophagus and mouth. Also called regurgitation.

Reflux Esophagitis (REE-fluks uh-SAW-fuh-JY-tis)
Irritation of the esophagus because stomach contents flow back into the esophagus.

Regional Enteritis (REE-juh-nul en-tuh-RY-tis)
See Crohn’s Disease.

Regurgitation (ree-GUR-juh-TAY-shun)
See Reflux.

Dry vomiting.

Rotavirus (ROH-tuh-vy-rus)
The most common cause of infectious diarrhea in the United States, especially in children under age 2.

Rupture (RUP-tchur)
A break or tear in any organ or soft tissue.

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