Abstract
ICR mice were given four subcutaneous injections of bis(2-oxopropyl)nitrosamine (BOP) 10, 20 and 40 mg/kg body weight, respectively, on day 1, 8, 15 and 22 of age. Animals treated with BOP developed mainly tumors of the lung, liver, nasal cavity, and pancreas. Lung tumors were histologically alveolar cell adenoma or adenocarcinoma at an incidence of 41-100%, hepatocellular adenoma or carcinoma 59-96%, adenoma or adenocarcinoma of the nasal cavity 11-26%, and pancreatic acinar cell adenoma or anaplastic carcinoma 3-7%. No sex difference in response to BOP carcinogen was observed.
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