1] Table 7. ! Case Age| Cells Examined Contral* 28~53' T-3 39° T—8 37, Aberra, 100 20 40 #35 45 K- 6 K--9 200 200 2.0 90 200 200 200 200 $5 £5 2.0 5.5 2,500 39 K-10 K-1b K-12 K-13 K-16 Total | 33 36 3 35 20. 200 33 29 28 30 | CQ ! 2,300 (O60| (15) 200 40; 3.5 20, 20° 20. K—5 Cells*** | Fragments ; leemtrics 04 K--1 32, K--2 35 K— 4° 35 | , | 25 20 , |) 2 '§ | 3.50 30 45 30 20 2.0 2.0 G6 © | | 3.3 | oe Riss ! h Others 0 0 05 0 0 0 0 0.5 0 0 0 0.5 0.5 1.5 0 0 2.0 Ls 0.5 0 § | § 0 0 0.5 0.5 05 0.5 5 ° 0 0 1.0 0 0 0 0 0.5 0.3 o 40} 2,0 | | LO O85 | 1.0 | Ls | 13 % 7 | (1030) : (1.0230) 60 | 5.5 2.0 0 1.0 1.0 0.5 0.5 0 0.5 2.0 0 ith Abnormal: ! Abnormal: us 9 0.5 0.5 0.5 | Chreensme Chromosome | O05) 15 0 30 60 4.5 3.5 30 | Acentric ‘yy: No. of Chromatid’ sy euploid | Chromosome Aberrations | 40 40 | 65 | 65 4.0 65 60 6.5 5.5 6.5 5.5 6.5 | 4.5 50 350 35 5.0 70 | 7.0 5.0 3.5 3.5 5,0 5.3 | 5.1 * Consisting of eleven healthy male, ** Not being included in ‘‘ Tetal chromosome abnormalities” and ‘Cells with chromosome abnormalities ”. ** \ chromosome or chromosomes being missing from or additional to one or more of the seven chromosome groups: the distribution in the remaing groups being normal. Luke’s Hospital). No abnormal value urines from the exposed people wasdistribut- was obtained. BAIR: Cases T-8, K-2 and K-12 were meas- ed between 23.3+0.6 and 129.642.3 pCi/24 hrs. and the mean '’Cs contents were 79 ured. Data were +924, —295, and —2%, pCi/24+ hrs. urine. respectively. As Case K-2 was suspected of a slight enlargement of thyroid, '7Cs content from normal urine samples was distributed between 37.841.7 and 191.122.6 pCi/24 hrs. and the mean ‘*’Cs contents were '"T uptake, PBI conversion rate and Triosorb tests were added. No abnormal result was obtained. H. a. Internal Exposure '"Cs Whole Body Counting Gammaspectrometric analyses by whole bedy counting on the 13 exposed people 1) indicated no significant increase of ‘*’Cs, No difference was recognized between the curves trom the exposed persons and those from the controls. 2) Radiochemical Analyses of Urine ‘Cs analyses were carried out on 24-hour urine samples from 10 exposed people and 14 normal persons. The Cs content of On the other hand, the 112 pCi;24 hrs. Considering the results of whole body counting and urine analyses, '’Cs content of the exposed people is not different from that of the present normal Japanese. b. *Sr+"Y *°Sr analyses were done on the pooled urine samples collected from 3-5 exposed persons. As the control, 3 normal samples were analys- ed. No significant increase was found on the samples from the exposed persons. Summary Medical examinations were carried out from middle of January to middle of May 1964 on 18 persons exposed to fall-out in the middle Pacific