摘要: Mammary cancer is one group of neoplasms which exhibits striking human and species differences. glands characterize the class mammals named after them. In industrialized world United States Western Europe cancers breast are very frequent in women occur also male. Little known about mammary appear wild, zoo majority domestic animals. Cancers common some domesticated animals such as bitch laboratory certain strains mice (CH3), well population particular nations, USA. other nations Singapore animals, horse cow guinea pig rabbit rare. This aspect suggests that a comparison between different groups may result new understanding useful for future therapy.