Donald Gleason

Dr. Donald Gleason was an American pathologist best known for developing the Gleason grading system for prostate cancer. This system classifies tumors based on their appearance under a microscope, helping doctors determine how aggressive the cancer is. By evaluating the pattern of cancer cells, the Gleason score guides treatment decisions and prognosis. His work has significantly improved the accuracy of prostate cancer diagnosis and has become a standard tool worldwide in understanding and managing the disease.