- Genomic changes in endometrial polyps associated with tamoxifen show no evidence for its action as an external carcinogen. Dal Cin, P., Timmerman, D., Van den Berghe, I., Wanschura, S., Kazmierczak, B., Vergote, I., Deprest, J., Neven, P., Moerman, P., Bullerdiek, J., Van den Berghe, H. Cancer Res. (1998)