D38: Neoplasm of uncertain or unknown behaviour of middle ear and respiratory and intrathoracic organs

D38.6: Neoplasm of uncertain or unknown behaviour: Respiratory organ, unspecified

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 respiratory organs include the nasal cavities, windpipe and lungs, for example.