What Causes Cancer?
Cancer harms the body when damaged cells divide uncontrollably to form lumps or masses of tissue called tumors (except in the case of leukemia where cancer prohibits normal blood function by abnormal cell division in the blood stream). Tumors can grow and interfere with the digestive, nervous, and circulatory systems and they can release hormones that alter body function. Tumors that stay in one spot and demonstrate limited growth are generally considered to be benign.
Two Causes of Cancer Following
a. Cancerous cell manages to move throughout the body using the blood or lymph systems, destroying healthy tissue in a process called invasion
b. That cell a manages to divide and grow, making new blood vessels to feed itself in a process called pathogenesis.
When a tumor successfully spreads to other parts of on the body and grows, invading and destroying other more healthy tissues, it is said to have metastasized. This process itself is called metastasis, and the result is a serious condition that is very difficult to treat. In 2008, cancer claimed the lives of about 7.6 million people hole the world. Physicians & researchers who specialize in the study, diagnosis, treatment, and prevention of cancer are called oncologists.