Prostate cancer is the most common form of cancer among men in the United States, and is the third-leading cause of cancer death in men, after lung cancer and colorectal cancer. Prostate cancer is a disease in which abnormal cells in the prostate begin to grow uncontrollably, forming tumors.
Almost all prostate cancers are adenocarcinomas, which are cancers that begin in cells that make and release mucus and other fluids. Undiagnosed or untreated cancer can eventually spread, or metastasize, from the prostate to other parts of the body. The most common sites that it spreads to are the lymph nodes, the lungs, and bones.
While some prostate cancers can grow and spread quickly, many prostate cancers grow very slowly. Fortunately, this means that the vast majority of prostate cancers are diagnosed in the early stages.
When prostate cancer is diagnosed in the early stages, the survival rate is nearly 100 percent. Rarely, the condition is diagnosed after it has metastasized, in which case the survival rate drops dramatically.