Q40: Other congenital malformations of upper alimentary tract
Q40.9: Congenital malformation of upper alimentary tract, unspecified
The upper digestive organs include the oral cavity, the esophagus, the stomach and the first section of the small intestine. While developing in the womb, many different types of tissue develop in the body. The organs and body parts develop out of the various types of tissue. While developing in the womb, the tissue can change its form and its position in the body. Some tissues merge into one another. Other tissues also degenerate to some degree during development. If the tissue is disturbed while developing, defects may result.
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