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Hypoplastic left heart syndrome is a heart problem that is present at birth (congenital) in which the left side of the heart and

A latent (inactive) tuberculosis (TB) infection is the presence of TB bacteria in a person's lungs even though they do not have

Inflammatory bowel disease (IBD) is a condition that causes ongoing inflammation of the intestines. The condition can affect only

An intrauterine device (IUD) is a method of birth control that is placed inside the uterus to prevent pregnancy. All IUDs have a

Islet cells are located in the pancreas and make hormones, including insulin, glucagon, somatomammotropin, and pancreatic

An abnormal heartbeat (arrhythmia) is any variation in the normal heartbeat. Abnormal heartbeats occur when the heart has an

Irritable bowel syndrome (IBS) is a digestion problem that causes episodes of belly pain, cramping or bloating, and diarrhea or

Iron deficiency anemia means that your body doesn't have the iron it needs to make enough red blood cells. Red blood cells carry

Iritis is an inflammation of the colored part of the eye (iris) that can cause redness, pain, light sensitivity, and in some cases

An intravenous pyelogram (IVP) is an X-ray test that uses a special dye (contrast material) to outline the structure of the