* C ( TABLE 1 Thyroid Lesions in Marshallese, April 1976 Group Rongelap exposed (175 rads) ‘Age at Est. thyroid to Subjects” with] < 10 10-18° 810-1150 335-810 89.5 (17/19) 25.0 (3/12) 15 1 556° 35.9 (23/64) 19 exposure > 18 All Ailingnae exposed (69 rads) < 10 10-18 > 18 All In utero exposed Utirik exposed (14 rads) jRongelap unexposed , I < 10 10-18 > 18 All < 10 10-18 > 18 All dose, 335 rads thyroid lesions 9.1 (3/33)¢ 275-450 190 135 217¢ 33.3 0.0 36.3 33.3 175+? 69+? 33.3 (1/3) 0.0 (0/1) 60-95. 27-60 27 50¢ No. subjects| with surgery] 1.7 9.5 9.0 6.4 (2/6) (0/1) (4/11) (6/18) (1/58) (2/21) (7/78) (10/157) 0.0 (0/72) 15.4 (2/15) 7-4 (9/122) 6.1 (2/33) 4.7 (3/64) £ 1 0 1 1 3 4 1.7 (1/58) 4.8 (1/21) 1.3 (2/157) 0 1 2 5.3 (11/209) 3 Likiep unexposed < 10 > 10 All 0.0 (0/31) 4.7 (5/106) 3.6 (5/137) 0 0 0 Wotje unexposed < 10 > 10 3.4 (3/88) 5.7 (4/70) 0 0 All unexposed 5.3 (1/19) 3 1 0 3 4 % Subjects” wit! malignant lesio: All 4.4 (7/158) 0 < 10 > 10 All 1.6 (3/191) 6.4 (20/313). 4.6 (23/504) 0 0 0 = Dose from 131, 132, | 133, | and 1355 plus gamma; mean dose extrapolated from calculations~° for adults and 3-year olds (see Section II). b Based on number of people exposed, excluding those in utero (number of cases/total number in group). “ The thyroid is considered to be fully developed by about age 18, d One additional case of adenoma, found at autopsy, not included here. © Weighted mean dose. £ Pathologists differed as to whether this lesion was malignant; it was scored as benign.