Pulmonary Metastases From Autochthonous 3-Methylcholanthrene-Induced Murine Tumors

Abstract
In three experiments, 87%, 75%, and 85% of female C57BL/6N mice developed pulmonary metastases by 50 days after amputation of legs having autochthonous 3-methylcholanthrene-induced sarcomas. No difference in the incidence of pulmonary metastases was observed when autochthonous tumors of short (49–94 days) and longer (95–119 days) latency periods were compared. These metastasizing autochthonous tumors may provide a useful model for studies of metastases and for the evaluation of cancer therapy in a minimal residual disease setting.