D37: Neoplasm of uncertain or unknown behaviour of oral cavity and digestive organs

D37.3: Neoplasm of uncertain or unknown behaviour: Appendix

When there is abnormal growth of tissue, then this is also referred to as a tumor. The tissue in the body is made up of cells. A tumor disorder involves the cells multiplying more than normal. This results in abnormal or excess tissue forming. A tumor can be benign or malignant.

The appendix is usually located on the right side attached to the first part of the large intestine. The first part of the large intestine is also known as the cecum.