Currently there are at least about 200 types of cancer. However, the characteristics of all cancers are the same, namely the growth and spread of abnormal cells uncontrolled. Why cancer can develop in a person and not on others, it is not yet fully known.
The researchers speculate, 5-10 percent of cancers may be inherited. That is, the disease is inherited by one generation to the next generation through genes that are not normal. However, in most cases, the cancer develops through a complex series of steps that often include excessive exposure due to carcinogens (cancer causing substances), such as tobacco or the sun.
Carcinogen believed to cause the formation of free radicals, which can damage the strands of DNA molecules carrying information on how to reproduce.
Once there is DNA damage, cancer cells can be formed.
Therefore, one way to prevent cancer is to reduce exposure to anything that stimulates the formation of free radicals, including fat-rich foods, tobacco, and alcohol.
Cancer can develop in several forms, namely:
Carcinoma
This is a cancer that originates, whether from outside or within the body surface, such as skin cancer and colon cancer.
Sarcoma
Sarcoma is cancer that develops in the supporting tissues of the body, such as bone and muscle.
Lymphoma
Cancer called lymphoma when it comes from the lymph glands or lymph nodes and the immune system.
Leukemia
Leukemia derived from bone marrow and present in the bloodstream.
