There are different types of cancers affecting various organs in the body. The main types of cancer are carcinomas, where cancer begins in the skin or in tissues that line or cover internal organs. Different subtypes include adenocarcinoma, basal cell carcinoma, squamous cell carcinoma and transitional cell carcinoma; sarcomas are cancers that begin in the connective or supportive tissues such as bone, cartilage, fat, muscle or blood vessels; leukaemias, cancer of white blood cells, lymphomas and myeloma are cancers that starts in blood forming tissue such as the bone marrow and causes abnormal blood cells to be produced and go into the blood; lymphoma and myeloma are cancers that begin in the cells of the immune system; brain and spinal cord cancers are cancers caused in central nervous system. This session discusses more about organ defined cancers.