1. Thorotrast exposure has also been associated with the development of angiosarcoma.2. About 2 to 10 million patients worldwide have been treated with Thorotrast . 3. The risk of leukemia appears to be 20 times higher in Thorotrast patients. 4. Due to the release of alpha particles, Thorotrast was found to be extremely carcinogenic. 5. The cancers occur some years ( usually 20-30 ) after injection of Thorotrast . 6. It has also been associated with individuals exposed to arsenic-containing insecticides and Thorotrast . 7. It was sold under the name Thorotrast . 8. The use of thorotrast was halted after scientists learned of its harmful effects to the liver. 9. Autoradiography was then used by the Finsen Institute to investigate the effects of the radiocontrast agent thorotrast . 10. There is a high over-incidence of various cancers in patients who have been treated with Thorotrast .
