in the Marshallese populations would be difficult, if not impossible, to distinguish from spontaneous tumors. Table 1. Age* Sex Year of death — Moy sy Se A yy Rongelap exposed 60 60 71 19 64 31 36 45 55 Utirik exposed 64 M 43 29 62 Malignancies. F F F 1959 ‘1962 1966 1972 1974 Type Ovary Cervix** Uterus ** Acute myelogenous leukemia Stomach Thyroid i tt 1959 Rectum(? )** Thyroid " tT 1960 Cervix** Thyroid W *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 in both exposed and unexposed populations, and many have been removed. number of such tumors appeared to be in the normal range of expectancy. The 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 -