Wilhelm Conrad Roentgen discovers x-rays. This discovery is thought of as one of the greatest technological accomplishments of all time. It made a huge impact on cancer detection and treatment.
Four years later (1899) Tage Anton Ultimus Sjogren successfully treats cancer with x-rays.1
- 1Morton, Leslie T., and Moore, Robert J. A Chronology of Medicine and Related Sciences. Aldershot, England: Scholar Press, 1997