Prostate cancer is a type of cancer that occurs in the prostate gland, which is a small walnut-shaped gland in men that produces seminal fluid. It is one of the most common cancers among men. Prostate cancer usually grows slowly and may not cause significant symptoms in its early stages. However, as it progresses, symptoms may include difficulty urinating, blood in the urine or semen, erectile dysfunction, and pain in the pelvis or lower back. Treatment options for prostate cancer depend on factors such as the stage of the cancer, the patient's age and overall health, and may include active surveillance, surgery, radiation therapy, hormone therapy, chemotherapy, or immunotherapy. Early detection through screening tests such as PSA (prostate-specific antigen) blood tests and digital rectal exams can help in the early diagnosis and treatment of prostate cancer.