The following are various types of cancer and their risk factors:

* Breast- Family history of breast cancer, late childbearing, childlessness, obesity.

* Bladder- Smoking (nearly half of cases), hair dye - bladder cancer is more common in men than women.

* Cervical- First intercourse at an early age, history of genital herpes, multiple sexual partners.

* Colorectal- Being over 50 with colon polyps or ulcerative colitis, high-fat, low-fiber diet and smoking and family history of these disorders or colon cancer.

* Leukemia- benzene, Exposure to radiation benzene and other chemicals.

* Lung- Smoking (83 percent of cases), radiation, exposure to asbestos and secondhand tobacco smoke.

* Lymphoma- Being 50 and more than 50, no other known risk factors.

* Oral- Smoking, heavy alcohol use and chewing tobacco.

* Pancreatic- high-fat diet, Smoking.

* Prostate- More than 80 percent of cases occur after 65, risk increases with age.

* Skin- family history of skin cancer, frequent sun exposure, Fair skin, severe sunburn in childhood.

* Uterine- Being post-menopausal with a history of infertility, ovulation failure or abnormal bleeding, hypertension, diabetes, and obesity.