History of veterinary radiation oncology.

The history of veterinary radiation oncology is reviewed from 1895 to the present. The field was very slow to develop from the early 1900s to the 1980s. Rapid progress is now being made with much greater interest on the part of the companion animal-owning public for more advanced treatment of various diseases. The number of veterinary radiation oncologists and the number of well-equipped radiation therapy centers are increasing.