6 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, died from liver damage 206 days after the A. Interval Histories Their occupations in 1964 were as follows: Fisheries, including pelagic fisheries-:----5 Seaman crcreccccccccceseccensrccecseecssenscssessees l exposure. In otherpatients, liver function gradu- Labourers disturbances have not been found. For example, CCFtest 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 with peripheral blood culture method. The Personal business Farmer ally recovered, and clinically significant liver results of the study, however, were notsufficient 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. lil, 1964 Medical Survey As already mentioned, we havetried to per- form medical survey on these irradiated persons on an annualbasis. However, sufficient examina- tion was 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. Duringthis period, Dr. R. A. Conard from Brookhaven National Laboratory, the Head of U.S.A.E.C. Medical Survey Team on Marshallese exposed to fallout on | 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. coccccscccteccseeneseceeeneeeseenesenseees 8 cccccecsecesteceeccseceeeetsersesassssecnanes l «oocerrseerreeeeesee tenes ees 4 Telegraph OPELAtOr Technical official vreeeeerereeeeeeeeeseereees ] ---:eee-ceeeeeeeeseeeeer sneer 1 Occupation UNKNOWN corecreceereseeceeeeeeee 1 Theinterval 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 4-2 finger breadth below r. costal margin at mid-clavicular line, but they were soft and not Cirrhotie. 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 T-2, K~-1l, and K-6 showed slightly elevated minimum blood pressure (94, 98, 98, respectively). C. 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). Pigmentation, depigmentation andteleangiectasia were observed macroscopically (Plate 1). His-