<prompt> Risk factor for angiosarcoma of liverOCPPhenacetinVinyl chlorideAll of the above  <response>: Angiosarcoma of the liver, a rare fatal tumor, has been seen in workers intensively exposed to the gas vinyl chloride monomer VCM for prolonged periods while working in polyvinyl chloride PVC polymerization plants. It has also been associated with individuals exposed to arsenic-containing insecticides and Thorotrast 