Pancreatic acinar cell adenoma

Although several epidemiological studies have suggested a positive association between dichlorvos exposure and cancer, conclusions are limited because all have involved small study groups and exposure to several agents. In animal studies chronic gavage administration of dichlorvos caused a dose-related increase in papillomas of the forestomach in mice and a dose-related increase in mononuclear-cell leukemia and an increased incidence of pancreatic acinar cell adenomas in male rats. The lARC has determined that there is sufficient evidence for the carcinogenicity of DDVP in experimental animals and inadequate evidence in humans. ... 

Rats fed diets containing 30 or 300ppm ammonium perfluorooctanoate for 2 years had increased liver weights with occasional necrosis and an apparent dose-dependent increase in Leydig cell adenomas, but there was no evidence of an increased incidence of hepatocellular carcinoma. In a follow-up study in male mice, 300ppm in the diet for 2 years caused increases in liver, Leydig cell, and pancreatic acinar cell tumors that may have been associated with the peroxisome-proliferating capabilities of the compound. Ammonium perfluorooctanoate also produced sustained increases in serum estradiol concentrations. ... 

Benzyl acetate was tested for carcinogenicity by gavage in one experiment in mice and in one experiment in rats, and by administration in the diet in two studies in rats and in one study in mice. In the gavage study in mice, increased incidences of liver adenomas and of combined liver adenomas and carcinomas were oberved in animals of each sex. An increased incidence of forestomach tumours was observed in mice of each sex. An increased incidence of acinar-cell adenomas of the pancreas was observed in male rats administered benzyl acetate by gavage. Benzyl acetate did not increase the incidence of tumours in either mice or rats when administered in the diet. A low incidence of pancreatic carcinomas in situ was reported in one study. 

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