human
I want to know what are the different types of cancer.
assistant
The different types of cancers can be grouped into three main categories: carcinomas, sarcomas and leukemias. Carcinomas are cancers that begin in the cells of the skin or other organs. Sarcomas are cancers that start in the connective tissues, such as bone or muscle. Leukemias are cancers that develop from blood-forming tissue.