noe Subject No, Age Sex ments Exch- anges No. of Chromosome Aberrations mane Cells with Aberrations Chromatid Breaks Lsogaps Remarks* Exposed, 70 rad (continued) 70 25 1 1 81 18 1 1 2 2 84 830 25 859 71 A 931 10 RF 938 25 A 982 43 a 1005 31 1043 29 EF OFI 105 EF Unexposed * Except for Subject Nos. 3 and 64, all thyroid pathology was adenomatous goiter. Case 64 had a mixed papillary and follicular carcinoma of the thyroid. Exposed inutero Child of exposed Case 3 is a hypothyroid child.