Prostate cancer is cancer that happens within the prostate — a little walnut-shaped gland in men that produces the semen that nourishes and transports sperm. Prostate cancer is one among the foremost common sorts of cancer in men. Usually, prostatic adenocarcinoma grows slowly and is initially confined to the prostate, where it's going to not cause serious harm. However, while some sorts of prostatic adenocarcinoma grow slowly and should need minimal or maybe no treatment, other types are aggressive and may spread quickly. Prostate cancer that's detected early — when it's still confined to the prostate — features a better chance of successful treatment. Prostate cancer may cause no signs or symptoms in its early stages. Prostate cancer that's more advanced may cause signs and symptoms such as Trouble urinating, Decreased force within the stream of urine, blood in semen, Discomfort within the pelvic area, Bone pain, and Erectile dysfunction.