Gow LESIONS IN MARSHALLESE EXPOS@yro FALLOUT (AS OF MAY, 1974). | Marshall Island Group (radiation dose-gamma) <10 11-16 >16 all - (on Ailingne In VESTA Lesions dose-rads In-utero gamma exposure) Thyroid Thyroid 1 Exposure Rongelap (175 rads Rongelap Estimated Age at 175 + ? © 675 - 1440 335 - 675 335 - 488 - 9 Percent 33.3 (1/3) 12.5 (1/8) 8.1 (3/37) 32.8 (21/64) (0/1 . - 0 - <10 40, - 80 0.0 (0/53) all - 3.2 (5/157) <10 >10 <10 all >10 Rongelap unexposed all Likiep unexposed (1970) ai | ‘pose from LIL, rm LILy5 =a nN L149, 5833 22.2 (4/18) 22 5.4 (2/37) 4.7 (3/64) 2 Utirik” (14 rads gamma exposure) 5.3 (1/19) l 132 - 1 3 17 16.6 >16 all 15 Percent 49° (2/64 Island -69 rads gamma exposure) Lesicns Surgery 89.5 (17/19) .0 480 Malignant Thyroid 3 5.8 (6/104) 4 4 0.6 (1/157) - 1.6 (1/61) 4.5 (6/133) 0 2 2 - _ 7 - 0.0 (0/31) 4.7 (5/106) 3.6 (5/137) . O 0 0 - - 3.6: (7/194) 1.0 (1/104) aa” 2 °"I plus gamma dose, Based on number of original people exposed. in group. In parentheses number of cases/total number 3mhe thyroid is considered fully developed by age 16. Difference of opinion as to whether or not one lesion was malignant. was that it was benign. Majority opinion >The more energetic shorter-lived isotopes of iodine contributed less to the total thyroid dose in the Utirik people due to later fallout. One might surmise also that the biological effectiveness of the thyroid dose per rad would be less in that group. Fifteen children 10-17 years of age at exposure in this group received estimated thyroid doses between 22 and 40 rads. In addition to thyroid lesions, one case of acute myelogenous leukemia was discovered in September 1972 in a 19-year-old Rongelap boy who had received 175 rad gamma radiation at one year of age. He died November, 1972.