10 Table 6, Mitotically Connected Abnormalitics (per 1,000 Erythroblasts) Giant Aperrant Subject Binucleated "Erbl. “<|Karyomere some in Neutrophils No. Mitosis 067 oO T- 3 T— 6 4 4 "ILS 0 i | 2 K— 2 1.3 | 2 0 2 0 3.3 K— 1 0.67: 13 13 K— + K— 5 K— 6 0 K— 8 K—-9; K—10 K—l! K—12) K-13 | K-16 Normal | 1 2 3 4 5 7.3 5.3 0 = 067 0 | o 0 13 + _ _ = 4 0 0 2 0 0. — _ _ | ' | | 0 2 (OO | , , | . _ 0 O 0.67 0.67 + 067 2 27 2 4 0 —_ 2: Bor = |, °o = 13 |) — 0 0 2 13 + = 0 0 0 4 130 0 0 | — _ dicentric chromosomes and monocentric abnormal chromosome-type chromosomes, abnormalities which have never been observed in normal persons, occurred in them. Dicentrics were found in 7 cases, and monocentric abnormal chromo- somes were present in all of the cases examined. Also, ancuploid cells occurred in a high frequency. In view of the importance of these findings, long term observations are to be made. The chromosome abnormalities of these patients were reported elsewhere together with those of other radiation-exposed people, i.e. atomic bomb survivors, Thorotrast-injected patients, etc.'”’ G. Other Laboratory Studies Several laboratory studies were made on the subjects. The results of these examinations were mostly within normal range. However, some of them indicated slight abnormalities. ZTT: Normal. Thymol turbidity test: Cases K-5, 6,8 and 9 revealed high values (7~10). leteric index: Cases *K-8, 1], 13 and 16 show- ed slight increase (nearly 9). Serum alkaline phosphatase: Cases K-6, 7, 10 and 11 indicated in- In the histological sections, all showed nor- | mal cellular marrow. c. Haemorrhagic diathesis As to the haemorrhagic diathesis, no abnormalities were found. F. Chromosome Studies Chromosome studies succeeded on 13 of the exposed persons. The observation of chromosomes was made by cultures of peripheral leuco- cytes prepared in accordance with the method by Moorhead, ef al. with a slight modification. Samples were obtained 72 hoursafter initiation of culture, and 200 metaphases were examined in each culture for all the cases except one case. The control observations were based on 11 normal males, aged 28-53, creased values (12~18 King-Armstrong unit). GOT: GPT: data was obtained All data were within normal range. BSP test: Cases T-6 (12.593), K-6 (5-7.593) and K-13) (5-7.5%) revealed slight high retention (45 min.). Erythrocytes sedimentation rate: All were normal. Tests for syphylis: All were negative. Routine urine analyses: A sample from Case T-7 was positive for sugar (1/10~1/49). normal. observations are shown in Table 7. As shown in the table, frequencies of chromo- pathological except for T-7 (70 Frankel unit). Paperelectro|phoresis: No abnormal findings were obtained. Total cholesterol: All were normal. The results of the some aberrations in the exposed persons were much higher than those in the normal. Further, No Others were Feces; No parasites were observed. PBI: Five cases were measured for PBI con- tent by courtesy of Dr. Tachibana (St.

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