Table 5: Thyroid nodules occurring in those exposed in utero. ID No. Gestation age at exposure (in weeks) Estimated thyroid dose* (cGy) 1 23 870 2 24 870 3 10 190 4 4 190 5 17 270 6 24 110 7 16 270 8 33 110 9 24 110 10 32 110 11 35 110 12 Never examined: Nodule type Adenomatous nodule Adenomatous nodule Occult papillary cancer** gestational age unknown * Estimated total thyroid-absorbed dose, including internal and external exposures. ** Dividend opinion among the four consultants on the Pathology panel: occult papillary carcinoma (2) vs. adenomatous goiter (1) vs. nodule with fibrosis (1). This reports shows that the mortality rate of the exposed Marshallese is no different from the unexposed population. The exposed population and the comparison group are too small in number to determine if there is a Statistically significant difference in the incidence of neoplasia other than that of the thyroid. Ingestion of radioactive iodines by the exposed population, including the lesser exposed Utirik group, has resulted in an evident increased incidence of thyroid neoplasia even though this groupis small, as is the comparison population. In the Rongelap group, one neoplastic nodule has been diagnosed in the prior ten years and several neoplastic nodules have been diagnosed in the Utirik group during the same time period. The increased risk @f formation of thyroid neoplastic nodules appearg to still be present, although probably at a decreagingrate. 25