CONTENTS B. C. Methods . 2. 6. 6 6 5 6 oe te ee ew ee ee ew ee ee l. Thyroid Examinations : 2. Pathologic Evaluation . . 2... 2 1 1 ee we we ew 3. Thyroid Function . . 2. 1 46 6 1 ew ee ee we ee te ee Findings . . a l. Thyroid Nodules a (a) Clinical Characteristics ......+e+4-. (b) Prevalence .... Co ee ee ee (c) Gross Findings at Surgery wee ee ee ew ee (d) Histopathology .. 1. 6. 6 6 ee ee ee ee te D. 2. Thyroidal Hypofunction..... oe . 3. Thyroid Abnormalities in Cases Exposed In Utero . . 4 Problems Associated With the Thyroid Hormone Treatment Program 5. lodoprotein Studies .. eee ee ee ee Discussion of Thyroid Findings a ee on et ee RADIOLOGICAL MONITORING OF PERSONNEL AND ENVIRONMENT A. B. C. XI. 6 we 6 ew ee we ee we we we we we te a a 2. 6 ee ew we ew . ..... + wae ew ee 1, Rongelap and Utirik Bikini. 2... SUMMARY AND COMMENTS . REFERENCES APPENDICES 1 A. B. C. 7 Background . . 6 1 6 Methods .... Results and Comments Early Observations Late Observations Comments . 2. 2 6 6 I. Il. . . 4. 6 4 ... 6 ......4+50+468-. ew . 2... 1. 6 1 ww ew .....4..4 4.65.4 5 ew ww ee ee wt we ee ee eee ew ee we te ee ee et a 8 ee . Incidence of Thyroid Disease in Comparison Populations A. Thyroid Findings in Comparison Populations soe ee B. Expected Cases of Thyroid Nodules in Comparison Populations Based on Estimated Radiation Exposure Levels C. Comparison of Thyroid Findings in Marshallese Comparison Populations With Those in Other Unexposed Populations . Dose Assessment . . 1. 6. 6 6 2 ee ee ee we ee ee we he A. Early Radiation 1. 2. Source .. . . 1... 1 a ww ee ee te a Gamma (Whole-~Body) Dose cee ee ee B. 3. Skin Dose ..... 2. 2. ee ee we eee 4. Internal Doses er 5. Thyroid Doses ....... coe . Residual Radiation (Accumulated Exposure From Habitation C. D. 1. Early Calculations . ..... 6 «© «© ee 2. Reevaluation ......64 Bikini Dose Estimates .....+4+4654868-8 Other Atolls . 1. 1 ww ew we ee ee ee on Rongelap or Utirik Atoll) . 2. 2. 1 - xiii - 2 we we et te ee 55 55 55 56 57 57 57 57 61 63 70 74 75 76 76 82 82 82 82 82 83 85 86 86 87 89 104 104 104 104 107 110 110 110 11l 111 Ill 112 114 114 115 119 120