Makoto MiyamotoNaiyana NilsuwarnSubhkij AngsubhakornOsaka UniversityMahidol University2018-03-122018-03-121972-01-01Pathology International. Vol.22, No.2 (1972), 343-35214401827132054632-s2.0-84996366524https://repository.li.mahidol.ac.th/handle/123456789/10029Four additional chorionic tumors have been obtained by the same method as previously reported1 using 4‐NQO and 7,12‐DMBA as carcinogens. It was observed that high dosage of DMBA was quite effective in inducing chorionic tumors in rats. Gross and histological appearance of the tumor resembled that of normal placenta in rats. Part of the tumor has been transplanted and is now under observation. Copyright © 1972, Wiley Blackwell. All rights reservedMahidol UniversityMedicineArticleSCOPUS10.1111/j.1440-1827.1972.tb00745.x