one series of 12 rats was exposed to x-irradiation ( 1500 r ) of the stomach 19 days before implantation of walker tumour cells in the gastric mucosa , and the frequency of tumour take and the extent of tumour growth after 10 days were compared with a second series with the same tumour implantation , but without x-ray exposure .
C0038351
stomach
C0017136
gastric mucosa