tent, and increased retention of BSP, etc. were observed in most cases. One of the patients, who was pancytopenic at about the 4-7th week, A. Interval Histories Their occupations in 1964 were as follows: Fisheries, including pelagic fisheries-.----5 Seaman vevecceceeccerseeeeceeceeeeeecctenenteeenes 1 Labourers ---:ii:eceeceeececeaccee eee evenecntneeeees 8 Farmer cccesesseseeveveeesecsececcececeeeeeenteeeaes 1 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, CCP test was positive in most of the patients in 1955 survey (14 years), while CCF test in 1957 examinations was negative in all the cases. 6. Other Studies The study of leucocyte chromosomes was made The with peripheral blood culture method. 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. are healthy, but detailed medical examinations of the children have not been carried out yet. heart in K-10, and r. bundle-branch block was on an annual basis. However, sufficient examina- tion was impossible by several reasons. This 1964 survey was carried out as follows: Thirteen persons were examined at the matori, ef al. at the Yaizu City Hospital as outpatients. The period of hospitalization was 3-6 days. B. proved by ECG. required. No medical treatment was Case T-7 was proved glucosuria. Detailed 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 City Hospital. Cases T-2, K-l, and K-6 showed slightly Brookhaven National Laboratory, the Head of U.S.A.E.C. Medical Survey Team on Mar- elevated minimum blood pressure (94, 98, 98, respectively). visited Japan to be on hand for the examinations of Japanese fishermen. Dr. T. Kumatori, National Institute of Radiological Sciences, went to the C. shallese exposed to fallout on | March 1954, Marshall Islands with Dr. Conard, and coope- rated with U.S. Medical Survey Team for about 3 weeks. This exchange visit was valuable for STE SER BE ae ie to be late effects. Since the 1963 survey no significant disease has occurred. Their children Four persons were examined by Dr. Ku- As already mentioned, we have tried to perform medical survey on these irradiated persons 2) after the release from the hospitals did not seem National Institute of Radiological Sciences, and one person at the Tokushima University Hospital, under hospitalization. 1964 Medical Survey 1) Telegraph operator ----------r er l Technical official ---:--::--e 1 Occupation unknown «seer l The interval medical histories were summarized in page 2 and Table2. Several diseases contracted Physical Examinations The routine physical examinations revealed the following: In 10 cases among the 18 examined, livers were palpable 4-2 finger breadth below r. 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 Content-of Na, Kk, P and Ca in serum was normal. Nl. Personal business -cccccccccecreeceeteeteeteetes 4 medical examinations are to be done at Yaizu Skin Lesions Residual skin changes in areas previously exhibiting beta burns werestill observed in some cases. Most remarkable residual changes were shown in abdominal wall (T-6, K-2, 4, 5, 7, 11, 12, 13). understanding of radiation effects on both Japa- Pigmentation, depigmentation and teleangiectasia nese and Marshallese exposed people. were observed macroscopically (Plate 1). » a * My? ET OEETENEPEI ENUF EIS Rye TT EISSETANN| TEARSE TY TTEOTT TT ne AEF, ee eT , ele. His-