Hematological Studies on the Atomic Bomb Survivors in Nagasaki (The 4th Report)

From February to March of 1956 a mass medical examination was conducted on the A-bomb exposed. Comparing the A-bomb survivors groups with the control groups, and also comparing with the results of the examination in 1953 we reached the following conclusions: 1) In comparison with the year of 1953 the exposed groups showed a marked restoration of anemia and a marked decrease of eosinophilia in 1956. 2) In 1956, WBC count, Hb. lebel, eosinophilia above 5%, percentage of monocyte and lymphocyte showed no significant variation between the exposed and control groups. Only for eosinophilia above 10% the exposed groups showed a more significant high rate than the control groups. 3) Accordingly, so tar as concerned with the peripheral blood, it may be duly said that hematopoietic dysfunction returned to an almost normal condition in 1956, eleven years after exposure

Blood Picture of Nagasaki Atomic Bomb Survivors

The results of hematological studies in Nagasaki on atomic bomb (A-bomb) survivors which were carried out at Second Department of Internal Medicine from 1946 to 1956 have been brought for summary. 1) Anemic and leukopenic tendency revealed in the exposed in 1946 and 1947 has recovered as time went on, no difference being noticed in 1948 in cases of leukopenia and in 1956 in cases of anemia comparing with the control. 2) The incidence of eosinophilia in the exposed showed a characteristic variation from 1947 to 1953,which may be related to the A-bomb radiation. However, in 1956, no difference was noticed between the exposed and control. 3) In general, the tendency of restoring to normal values was extremely strong in the exposed in each item of investigation. Accordingly, so far as concerned with peripheral blood, no significant difference was observed between the exposed and control in 1956. 4) However, the clinical investigation of bone marrow in the exposed performed in 1956, still suggested a possibility of maturation arrest of granulocytic and megakaryocytic series in the short distance exposed. 5) Three cases of chronic myelocytic leukemia were found in these mass survey, two of them being in an early stage of the disease