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• A to Z: Interrupted Aortic Arch

  Read about this condition in which the aorta has developed in a way that divides it into two parts and interrupts the proper flow of blood.

• A to Z: Interventricular Septal Defect

  Learn about congenital heart defects and conditions that affect the heart and circulatory system.

• A to Z: Intestinal Malabsorption

  Learn about gastrointestinal problems and conditions that affect the digestive system.

• A to Z: Intestinal Malrotation

  Malrotation is twisting of the bowel that happens when a baby’s intestines don’t develop properly in the uterus. It can be a medical emergency.

• A to Z: Intracerebral Hemorrhage

  See: Hemorrhage, Intracerebral.

• A to Z: Intussusception

  Intussusception is a problem with the intestine in which one portion of the bowel slides into the next.

• A to Z: Iridocyclitis

  Learn more about conditions of the eyes and factors that may contribute to vision loss.

• A to Z: Iritis

  Learn more about conditions of the eyes and factors that may contribute to vision loss.

• A to Z: Iron-Deficiency Anemia

  Iron-deficiency anemia occurs when there aren’t enough healthy red blood cells in the bloodstream to carry oxygen to the body’s tissues.

• A to Z: Irritable Bowel Syndrome

  Irritable bowel syndrome (IBS) is a common intestinal disorder that can cause cramps, gas, bloating, diarrhea, and constipation. It is sometimes called a “nervous stomach” or a “spastic colon.”