Prostate cancer is the malignant enlargement of the prostate gland in men.
Until the age of about 45-50 years, the prostate remains fairly constant in size. After this age, the gland can enlarge and affect the normal process of passing urine. Prostate cancer is a significant health problem. It is the second most common cause of cancer deaths in Australian men, causing about 2,500 deaths each year. Prostate cancer mainly affects men in older age groups.