Doctors divide cancer into types based on where it began. Four main types of cancer are:
Carcinomas: A carcinoma begins in the skin or the tissue that covers the surface of internal organs and glands. Carcinomas usually form solid tumors. They are the most common type of cancer. Examples of carcinomas include prostate cancer, breast cancer, lung cancer, and colorectal cancer.
Sarcomas: A sarcoma begins in the tissues that support and connect the body. A sarcoma can develop in fat, muscles, nerves, tendons, joints, blood vessels, lymph vessels, cartilage, or bone.
Leukemias: Leukemia is a cancer of the blood. Leukemia begins when healthy blood cells change and grow uncontrollably. The four main types of leukemia are acute lymphocytic leukemia, chronic lymphocytic leukemia, acute myeloid leukemia, and chronic myeloid leukemia.
Lymphomas: Lymphoma is a cancer that begins in the lymphatic system. The lymphatic system is a network of vessels and glands that help fight infection. There are two main types of lymphomas: Hodgkin lymphoma and non-Hodgkin lymphoma.
Cancer is a group of more than 100 different diseases. It can develop almost anywhere in the body. Cancer subspecialities are Breast Oncology, Gastro-intestinal oncology, Thoracic Oncology (eg. Lung cancer), Hepato-biliary oncology (eg. liver and pancreas cancer), Gynecological Oncology (eg. uterus and ovary cancer), genito-urinary Oncology (eg.prostate,kidney, penis, and urinary bladder cancers), Bone and Soft tissue tumors.