Cancer is said to be one of the most dangerous diseases which cause more death rates in human beings. Excessive multiplication of body cells in the body is called cancer. A Cancerous tumor in scientific term called as carcinoma. There are two types of tumors namely the malignant tumor and benign tumor. The malignant tumor is a very dangerous tumor, which penetrates into the body and ultimately destroys the normal tissue. Normally cancerous cells spread throughout the body through the blood stream. The benign tumor is not dangerous though its growth is very slow. Benign tumor cells do not spread all over the body. In olden days cancer was caused to old people. But nowadays, due to pollution and chemicals used in the industries all the age groups are getting affected to this hazardous disease. Cancer is mainly caused in human beings due to chemicals, radiation, unhealed wounds, and viruses. The agents which cause cancer is called carcinogens. Hydrocarbons in Cigarettes cause cancer too. Young people who are addicted to smoking are affected by cancer. Throat cancer is caused mainly by smoking. Mainly people working in chemical industries are affected by cancer due to the dyes and insecticides.
Ultra violet radiation causes skin cancer. Cancer might cause due to hereditary reasons also. Cancer might transfer from parents to offspring through DNA of the egg and sperm cells. The appearance of tumor is either inflammation or cystic. The cancer treatment methods are surgery, radiation therapy, chemotherapy and biological therapy. Cancers like the breast cancer, stomach and uterus is done through surgery. Few well known methods of curing cancer is chemotherapy. Biological therapy is the most recent approach to cure the fatal disease.