title: [Experimental pulmonary metastasis of Chinese hamster mesenchymal chondrosarcoma cell lines].
abstract: Pulmonary metastases of chinese hamster mesenchymal chondrosarcoma cell lines, MCS-1 (undifferentiated type) and MCS-8 (differentiated type), were examined by intravenous transplantation into athymic nude mice. The incidence of pulmonary metastasis of MCS-1 was 100% and that of MCS-8 was 33% at the 23rd day after transfer. Mean number of metastatic nodules in the lung was 41 in the former and only 3 in the latter. Mean survival time of mice with MCS-1 injection (5 x 10(4) cells) was 27 days and that with MCS-8 (5 x 10(4) cells) was 48 days after transfer. At the 42nd day after transfer of MCS-8, however, the incidence of pulmonary metastasis was 100%. These data suggest that the tumor growth rate in the metastatic lesion, as well as the affinity to the target organ, is very important for evaluation of experimental metastasis.
mesh_terms: D000818:Animals; D001859:Bone Neoplasms / Q000473:pathology*; D018211:Chondrosarcoma, Mesenchymal / Q000473:pathology / Q000556:secondary*; D006224:Cricetinae; D003412:Cricetulus; D005260:Female; D008175:Lung Neoplasms / Q000473:pathology / Q000556:secondary*; D008297:Male; D051379:Mice; D008819:Mice, Nude; D009368:Neoplasm Transplantation; D014407:Tumor Cells, Cultured