C44: Other malignant neoplasms of skin

The group of conditions under the title "Other Malignant Neoplasms of Skin" generally refers to various types of skin cancer that are not melanoma. These cancers start in the cells of the skin. These abnormal cells grow uncontrollably and have the potential to spread to other parts of the body, a process called metastasis. Common symptoms include changes in size, shape, or color of a mole or skin lesion, or the development of a new growth on the skin. Risk factors include excessive sun exposure, having fair skin, a history of sunburns, and a weakened immune system. The affected systems are primarily the skin and, if the cancer spreads, possibly other body organs. Progression of these conditions can vary widely, from slow-growing cancers that may remain localized, to aggressive forms that metastasize quickly.