C79: Secondary malignant neoplasm of other and unspecified sites

C79.2: Secondary malignant neoplasm of skin

The tissue in the body is made up of cells. With cancer, the cells multiply uncontrollably, which leads to a malignant neoplasm (abnormal growth of tissue) developing. The cancer cells can destroy the healthy tissue and spread throughout the body.

The cancer cells have spread in your body and multiplied at another site. These are called metastases.