The estimated proportion of second cancers related to radiotherapy varies according to the location of the first cancer of 4 percent of cancers of the eye and orbit to 24 percent for cancer of the testicles.

With improvements in survival rates for cancer, has the determination the long-term risks of treatments like radiotherapy is important. It is well known that radiation treatment risk of developing risk of developing a second cancer, but until now, the proportion of second cancers are related to radiotherapy was not known.Josef Penninger discover new gene The tumor growth suppressingBC Cancer Agency scientists led by Dr. Poul Sorensen performed received a new gene encoding suppressing the growth of human tumors several cancers, including discovered breast, lung and liver cancers as well melanomas, lymphomas and sarcomas.