Abstract
The pulmonary tumorigenicity of arsenic trisulfide and calcium arsenate was explored following 15 intratracheal instillations in male Syrian golden hamsters at weekly doses of about 3 mg/kg body weight (as arsenic). One lung adenoma appeared in 28 animals examined in the arsenic trisulfide group and 4 adenomas in 35 animals surviving the treatment with calcium arsenate. No adenomas were seen in 26 animals instilled with the vehicle (0.9% saline solution). The results show that calcium arsenate is tumorigenic ( P < 0.05), while the evidence is inconclusive for arsenic trisulfide.
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