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A case of canine fibrosarcoma with abnormal chromosomes.

A case of canine fibrosarcoma having prominent metastatic changes over the entire lungs and some other organs was described. Chromosome studies in cultured cells revealed that the tumor cells showed hypodiploid modal chromosome numbers 54 and 56, with many biarmed chromosomes. The general karyotypic similarity among certain canine tumors such as venereal sarcomas, lymphosarcomas and the presen t case is discussed.