Ind Irg lo IO October 2, 1964 MEMORANDUM FOR CHAIRMAN SEABORG THROUGH GENERAL MANAGER SUBJECT: THYROID DISEASE IN RONGELAP ISLANDERS During the February 1964 annual medical survey of the Marshallese Islanders exposed to fallout from the March 1, 1954, shot over Bikini, three young teenagers, 13-14 years old, were found to have nodules in their thyroid glands, The medical team felt that two of them should have immediate thyroidectomies, and these operations were successfully carried out at the Naval Hospital on Guam with the full cooperation of the Trust Territory people and the medical services of the Department of Defense, The pathological diagnoses were papillary adenocarcinoma, a malignant tumor of the thyroid, The prognosis, of course, is uncertain, but the surgeons are reported to have felt that they may have removed all the neoplastic tissue, While this information has not been transmitted formally, it is regarded as reliable. It is planned that a ten year summary of the health status of the exposed Marshallese, including these recent developments, will be prepared for prompt publication in a prominent journal such as the Journal of the American Medical Association, Preparations are now going ahead to have the third child with a small nodule operated on as soon as possible. The estimated doses to these thyroids are some 100 to 175 rads external gamma plus 100 to coe te Wl ~ remy [ect Ing 1a De at lo 150 rads from absorbed radioiodine,