User: What are the different types of cancers?
Assistant: Cancers are classified in two ways: Histological type, or the type of tissue in which the cancer originated, and by primary site, or the location in the body where the cancer first developed.

From a histological standpoint, there are hundreds of different cancers, which are grouped into six major categories: 
1. Carcinoma
2. Sarcoma
3. Myeloma
4. Leukemia
5. Lymphoma
6. Mixed Types