The primary role of the prostate is to provide part of the fluid that makes up your semen. The exact cause of prostate cancer is unknown. Initially, the tumor may not cause any symptoms. However, as the cancer progresses, the tumor can enlarge, and eventually put pressure on surrounding parts of the body, such as the urethra. This may block the flow urine from the bladder.
Prostate cancer can spread from the prostate to nearby lymphs nodes, bones, or other organs.
As a result, many men experience aches and pains in their bones, joints, or back. Stage A is early cancer. The tumor is located within the prostate gland and is too small to be detected by a rectal examination. In Stage B, the tumor is still within the prostate but may be large enough to be felt during a rectal examination. Stage C prostate cancer is more advanced and the tumor has spread outside the prostate to some surrounding areas.