cancer and it's classification

CANCER AND IT'S CLASSIFICATION
INTRODUCTIONCancer is a disease charised by excessive and rapid growth of the cells in a living organism.It can be seen at any tissue. There are two types of cancers , they are Benign and Malignant. Malignant cancers invade spread and ultimately destroy the surrounding tissue. In addition to this cancerous cells are carried to the whole body through blood stream and lymphatic vessel.
Benign tumors are non-cancerous, slow growing,encapsulated and non-metastatized which is specialized to particular part of the body.

cancer cell
CLASSIFICATION OF CANCEROUS TUMORS

Most of the cancer deaths are occured due to the malignacies of lungs, breast or colon. There are 100 types of cancers each having it's own symptoms and it's own special type s of therapy.Hence all these cancers are divided into three broad groups on the basis of histogenesis, that is, by identifying the particular type of tissue from which the tumor cell arise.
The major types are carcinomas, sarcomas,and mixed tissue tumors.
CARCINOMASCarcinomas are the largest group, they are solid tumors that are derived from epithelial tissue which lines the external nad internal surfaces of the body, and reproductive organs.There are two types of carcinomas namely, adenoma and adenocarcinoma. Adenomas are benign while adenocarcinomas are malignant.

SARCOMASSarcomas are not common as carcinomas, and are derived from connective tissue in the body,such asbone, fat,muscles,bone marrow, cartilage, and cells of the lymphatic system.
Benign tumors of connective tissue are named by adding oma -a suffix. for eg: tumors of bone is called osteoma.
In addition to the solid tumors of connective tissue origin, sarcomas arises from blood forming tissues also.Leukemias are tumors derived from bone marrow;whereas lymphomas from immune cells.
MIXED TISSUE TUMORSMixed tissue tumors are derived from tissue that is capable of differentiating into both epithelial and connective tissue.These uncommon tumors are thus composed of several different types of cells;which can be seen in kidney,ovaries and testes.
Wilms tumor of kidney and Teratoma of ovaries nad testes are some examples of it.