Experts have identified over 100 types of cancer. According to the National Cancer Institute, the most common type of cancer is breast cancer, followed by prostate cancer and lung cancer. Other common types include colon cancer, bladder cancer, kidney cancer, thyroid cancer, and liver cancer—all of which are named after the body parts they initially affect. Other types include melanoma, which develops in the skin, leukemia, which is cancer of the blood cells, and endometrial cancer, which begins in the uterus. Non-Hodgkin’s lymphoma is another common cancer which starts in the lymphatic system.