In thyroid cancer patients, radioiodine treatment has been shown to be associated with an increased risk of colon carcinoma. The aim of this study in thyroid cancer patients was to evaluate the role of familial factors in the risk of colorectal cancer and their potential interaction with radioiodine exposure.
National Institute of Public Health and Medical Research, INSERM, Unit 605, Institut Gustave-Roussy, 39 rue Camille Desmoulins, 94805 Villejuif, France.