Prostate-specific membrane antigen scan is used to evaluate prostate cancer by finding out if this cancer has metastasized. This kind of scan gives the doctors the ability to see if cancer has begun to spread. In elderly men, with examples such as an 81-year-old male, prostate cancer is quite common. Its symptoms may include painful urination or blood in urine. The scan can define the treatment approach best. It's harmless, and that's why it is recommended to gather enough information about malignancy to guide the patient's treatment.