Cancer Essay Example | Topics and Well Written Essays - 1000 words - 4

Cancer - Essay ExampleCancer was initially completely untreatable. With medical advances, such as autopsies, anesthesia and the microscope, scientific oncology was born. Finally, in the eighteenth century, the understanding of molecular epidemiology led to the modern study and discussion of cancer (American Cancer Society).The origin of cancer lies in abnormal mobile phone division. In normal cell division, new cells are produced as and when needed for a healthy body and when cells become old or damaged, they die and are replaced with new cells. Sometimes, there is damage to the cell DNA, the basic material in genes. These big genes may be caused by mutations or may also be inherited. Instead of dying, these damaged cells scat to the formation of groups of malignant clones, or duplicates of the abnormal cells. These groups form a mass of tissue called atumor. A benign tumor is harmless and its cells do not spread to other parts of the body. A malignant tumor is cancerous. Its cel ls invade adjoining tissues and spread to other parts of the body in a offset called metastasis. Cancer cells spread through the broth and lymph systems. There are more than 100 different types of cancer. The important types of cancer are Carcinoma - cancer which originates in the skin or the lining of tissues Sarcoma cancer which comes in in bone, cartilage, fat, muscle, blood vessels, or other connective or supportive tissue Leukemia cancer in the blood and bone marrow Lymphoma and myeloma- cancers that begin in the cells of theimmune system Central nervous system cancers- cancers that begin in the tissues of the brain and spinal cord (National Cancer Institute).The types of cancer are named according to the name of the electronic organ or tissue in which they originate. The main types are Adenoid Cystic Carcinoma, Adrenal Gland Tumor, Amyloidosis (blood), anal Cancer, Appendix Cancer, Astrocytoma