Objective: To isolate and identify the cancer stem cells in human fresh gastric cancer primary cells by combined spherical cultivation in serum-free culture media and immunomagneticbeads isolation technique. Methods: The gastric cancer primary cells in fresh gastric cancer tissues were cultured successfully, which were identified by hematoxylin- eosin(HE) stainning and carcino-embryonic antigen(CEA) immunohistochemisty. The gastric cancer cell spheres were obtained by spherical cultivation in serum-free cul...