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Meckel diverticulum is a small pouch in the wall of the intestine. It’s near where the small and large intestines meet. This condition is the most common birth defect of the digestive system. It happens to about 1 in 50 babies.

Tracheoesophageal fistula is a connection between the esophagus and the trachea. The esophagus is the tube that connects the throat to the stomach. The trachea is the tube that connects the throat to the windpipe and lungs. Normally, the esophagus and trachea are two tubes that are not connected.

Detailed information about ulcerative colitis, an inflammatory bowel disease (IBD).

Read on for details about stomach and duodenal ulcers in children. Learn about causes, risk factors, symptoms, diagnosis, and treatment.

Obstructive sleep apnea is a condition that causes a child to briefly stop breathing while sleeping. It happens because of a blockage in the upper airway. The pause in breathing may occur many times in a night, disrupting the child’s sleep.

A branchial cleft abnormality is a cluster of abnormally formed tissue in the neck. A branchial cleft abnormality is a birth defect. It happens when the area doesn't form as it should during the early stages of an embryo’s development.

A dermoid cyst is a collection of tissue under the skin. It may contain hair follicles, oil, and sweat glands.

Detailed information on structural abnormalities, including chromosome deletions and duplications.

To look for single gene defects, healthcare providers look at the DNA to see if it has any errors in it. Errors are known as mutations.