Four of the most common cancers in adults are skin cancer, lung cancer, breast cancer, and prostate cancer.

1. Skin cancer is the most common form of cancer. Fortunately, it is also the most curable. There are 2 forms of skin cancer: melanoma (the less common but more serious form) and nonmelanoma (the common, very treatable form). Over one million people are diagnosed with skin cancer each year.
2. There are 2 major forms of lung cancer: non-small cell and small cell. Small cell cancer usually grows and spreads more slowly. Its mostly caused by smoking.
3. Breast cancer begins in breast tissue.Breast cancer is the second most common cancer among women.
4. Prostate cancer begins in the prostate gland in men. Prostate cancer can grow quickly and spread to other parts of the body, or it can grow slowly and stay in the prostate. Three out of 4 cases of prostate cancer are the slow-growing type that causes few, if any, problems.