Magnetic Resonance Imaging (MRI)

(mag-NEH-tik REH-zuh-nuns IM-uh-jing) A test that takes pictures of the soft tissues in the body. The pictures are clearer than x-rays.

 

Malabsorption Syndromes

(MAL-ub-SORP-shun sin-drohmz) Conditions that happen when the small intestine cannot absorb nutrients from foods.

 

Mallory-Weiss Tear

(MAH-luh-ree-WYSS tair) A tear in the lower end of the esophagus. Caused by severe vomiting. Common in alcoholics.

 

Malnutrition

(mal-noo-TRISH-un) A condition caused by not eating enough food or not eating a balanced diet.

 

Manometry

(muh-NAW-muh-tree) Tests that measure muscle pressure and movements in the GI tract. See also Esophageal Manometry and Rectal Manometry.

 

Meckel's Diverticulum

(MEH-kulz dy-vur-TIK-yoo-lum) A birth defect in which a small sac forms in the ileum.

 

Megacolon

(MEG-uh-koh-lun) A large dialted colon that can result from chronic constipation, acute inflammatory processes, certain disease states and medications. See also Hirschsprung's Disease.

 

Melena

(muh-LEE-nuh) Blood in the stool.

 

Ménétrier's Disease

(may-NAY-tree-ayz duh-zeez) A long-term disorder that causes large, coiled folds in the stomach. Also called giant hypertrophic gastritis.

 

Metabolism

(muh-TAH-buh-lih-zum) The way cells change food into energy after food is digested and absorbed into the blood.

 

Motility

(moh-TIL-uh-tee) The movement of food through the digestive tract.

 

Motility Disorders

(moh-TIL-uh-tee dis-or-durz) See Functional Disorders.

 

Mucosal Protective Drugs

(myoo-KOH-zul proh-TEK-tiv drugz) Medicines that protect the stomach lining from acid. Examples are sucralfate (soo-CRAL-fayt) (Carafate), misoprostol (MIH-soh-PROH-stawl) (Cytotec), antacids (Mylanta and Maalox), and bismuth subsalicylate (Pepto-Bismol).

 

Mucous Colitis

(MYOO-kus koh-LY-tis) See Irritable Bowel Syndrome.

 

Mucosal Lining

(myoo-KOH-zul LY-ning) The lining of GI tract organs that makes mucus.

 

Mucus

(MYOO-kus) A clear liquid made by the intestines. Mucus coats and protects tissues in the GI tract.