Types of cancer which are formed by some specific cells are- Carcinoma, Sarcoma, Leukemia, Melanoma, Lymphoma and myeloma. There are also Central nervous system cancers, which are the cancers that begin in the tissues of the brain and spinal cord (brain and spinal cord tumors)
There are also some types of cancers which are considered as metastatic cancers. In metastatic cancer, cancer cells spread to other normal cells. It can spread to nearby tissues, lymph nodes or organs and even to a distant part of the body. This process of spreading of cancerous cells to other parts of the body is called metastasis. Such cancers are named the same as primary cancer. For example, if a woman is suffering from breast cancer and it has spread to her lungs, then she would be said to have metastatic breast cancer, not the lung cancer, and would be given the treatment for stage IV breast cancer. In metastatic cancer, sometimes it is difficult for the doctors also to decide the origin place of such cancer.