Prevention of cancer

Primary prevention
1. Lifestyle modifications
2. Chemoprevention
-isotretinoin and acyclic retinoids
-aspirin and other NSAIDs
-betacarotene and vitamin E
-calcium and selenium
-tamoxifen
-raloxifene
-isoflavones
-finasteride
Other current trials:
-folic acid
-fish oils
-vitamin suplementation
-polyprenols
2. Secondary prevention
-screening for breast cancer: digital mammography, MRI.
-screening for lung cancer: CT-scan, xray
-screening for cervical cancer: papanicolaou test, HPV DNA test.
-screening for colorectal cancer: colonoscopy
-the prostate,lung,colorectal, and ovarian cancer screening trial: PSA, DRE, chest xray,sigmoidoscopy, transvaginal ultrasound, CA 125.