in the Marshallese populations would be difficult, if not impossible, to distinguish from spontaneous tumors. Table 1. Age* Sex Year of death Moy yy oy Ze oy Rongelap exposed 60 60 71 19 64 31 36 45 35 Utirik exposed 64 M 43 F 29 F 62 F Unexposed 29 33 68 51 55 F Myke = 68 Malignancies. 1959 1962 1966 1972 1974 / Type Ovary Cervix** Uterus ** Acute myelogenous leukemia Stomach Thyroid tt 1959 Rectum(? )** Thy roid ft 1960 Cervix** Thyroid *Age at development of malignancy. **Not confirmed by biopsy or autopsy. B. Benign Tumors Thyroid nodules will be discussed in Section X.C.1, below. A number of other benign tumors, such as sebaceous cysts and lipomas, have been detected The in both exposed and unexposed populations, and many have been removed. number of such tumors appeared to be in the normal range of expectancy. Other benign tumors included a giant cell type removed from the finger of an exposed Rongelap female and a neurofibroma removed from the neck (near the thyroid) of an exposed Rongelap female. - 48 -