tent, and increased retention of BSP, etc. were A. Observed in most cases. One of the patients, who was pancytopenic at about the +-7th week, died from liver damage 206 days after the exposure. In other patients, liver function gradually recovered, and clinically significant liver disturbances have not been found. For example, CCF test was positive in most of the patients in 1955 survey (1$ years), while CCF Seaman cree cee ceeeeeee cetteetete ceeeee canes ] Labourers cece ce cece eee cet etttees 8 Farmer 00 ccecceeec cece seeteetee es teeeeee pee 1 Personal business results of the study, however, were not sufficient enough to be presented. Ophthalmological examinations showed slight lenticular opacities in several cases, but, these have not been related to the former exposure yet. Content of Na, K, P and Ca in serum was normal. 81964 Medical Survey \s already mentioned, we have tried to perform medical survey on these irradiated persons onan annual basis. However, sufficient examina- tion wag impossible by several reasons. This 1964 survey was carried out as follows: 1) Thirteen persons were examined at the National Institute of Radiological Sciences, and one person at the Tokushima University Hospital, under hospitalization. 2) Four persons were examined by Dr. Kumatori, ef al. at the Yaizu City Hospital as outpatients. The period of hospitalization was 3-6 days. The 1964 survey was performed from the end of January and finished at the beginning of May. During this period, Dr. R. A. Conard from Bruokhaven National Laboratory, the Head of U.S.A.E.C. Medical Survey Team on Marshallese exposed to fallout on 1 March 1954, visited Japan to be on hand for the examinations of Japanese fishermen. Dr. T. Kumatori, National Institute of Radiological Sciences, went to the Marshall Islands with Dr. Conard, and cooperated with U.S. Medical Survey Team for about 3 weeks. This exchange visit was valuable for understanding of radiation effects on both Japanese and Marshallese exposed people. 9) 0) st 4 Telegraph operator oe Technical official ms ee | Occupation unknown bocce c eee eeteaneeeees l tese in 1937 examinations was negative in all the cases. 6. Other Studies The studyof leucocyte chromosomes was made with peripheral blood culture method. The i. Interval Histories Their occupations in 1964 were as follows: Fisheries, including pelagic fisheries----- 3 The interval medical histories were summarized in page 2 and Table 2. Several diseases contracted after the release from the hospitals did not seem to be late effects. Since the 1963 survey no significant disease has occurred. Their children are healthy, but detailed medical examinations of the children have not been carried out yet. B. Physical Examinations The routine physical examinations revealed the following: In 10 cases among the 18 examined, livers were palpable !~2 finger breadth belowr. costal margin at mid-clavicular line, but they were soft and not cirrhotic. Case K-8 developed r. pulmonary phthisis in 1955 and received chemotherapy. At present, only small fibrotic foci are observed in r. subclavicular area on chest X-ray film. Systolic murmurs were heard at the apex of heart in K-10, and r. bundle-branch block was proved by ECG. No medical treatment was required. Case T~7 was proved glucosuria. Detailed medical examinations are to be done at Yaizu City Hospital. Cases elevated T-2, K-1, and minimum blood K-~6 showed pressure slightly (94, 98, 98, respectively). C. Skin Lesions Residual skin changes in areas previously exhibiting beta burns were still observed in some cases, Most remarkable residual changes were shown in abdominal wall (T-6, K-2, 4, 5, 7, il, 12, 13). Pigmentation, depigmentation and teleangiectasia were observed macroscopically (Plate 1), His-