Nerve or muscle damage in the stomach that causes slow emptying, vomiting, nausea, or bloating. Also called delayed gastric emptying.

An artificial opening from the stomach to a hole (stoma) in the abdomen where a feeding tube is inserted. See enteral nutrition.

The functional and physical unit of heredity passed from parent to offspring. Genes are pieces of DNA, and most genes contain the information for making a specific protein.

A segment of DNA with an identifiable physical location on a chromosome and whose inheritance can be followed. A marker can be a gene, or it can be some section of DNA with no known… 

Testing a population group to identify a subset of individuals at high risk for having or transmitting a specific genetic disorder.38

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

The genetic identity of an individual that does not show as outward characteristics.

See gastroesophageal reflux disease.

An infection of the parasite Giardia lamblia caused by spoiled food or unclean water. It can cause diarrhea. See gastroenteritis.

A buildup of bilirubin in the blood caused by the lack of a liver enzyme needed to break it down. See bilirubin.