The prostate is the gland that surrounds the bottom part of the bladder and the urethra in men. It produces a fluid that is ejaculated with sperm.
Prostate cancer is a malignant tumor that develops in the prostate gland.
It is most common in middle-aged and older men. There they begin to grow new tumors. The actual cause of metastatic prostate cancer is unknown. Metastatic prostate cancer often has no symptoms. The most common symptom of spread of prostate cancer is bone pain, especially of the back and pelvis.