Two established cell lines (JYG-A and B) isolated from mammary carcino
ma tissues of M. m. musculus Sub-Jyg (a chinese wild mouse) showed mul
tiple metastasis in the lung (100%), liver (40-60%), kidney (40-80%),
lymph node (20-60%) and other organs of the nude mice inoculated with
these cells subcutaneously or intravenously. In addition, 100% brain m
etastasis or infiltration was observed only when inoculated with JYG-B
cells intravenously.