Vinylchloride monomer exposure by the plastic industry workers basic condition for liver angiosarcoma appearance

The retrospective study of vinylchloridemonomer (VCM) exposure at 37 workers in the period from 1969 till 1987 was done, average time of exposition was 1.843 +/- 1.105 h, average VCM concentration was 543 +/- 228 ppm and average total exposure amount ("cumulative concentration of VCM") was 1.103811 +/- 1.050 766 ppmh at the time of autoclave cleaning 0.4 +/- 0.1 h. According updata investigations, high VCM concentration is essential for liver angiosarcoma (ASL) occurrence although the length of exposure is of concern. The possibility of new cases of angiosarcoma of liver is warned about.