tological section of these area revealed patchy loss of pigment cells at the base of the epidermis andslightly edematous upper dermis and papillae. The blood vessels showed slight vacuolation of the media of the muscular arteries, but no evidence of inflammation or neoplasm was found punctata was noted in T-6 who was examined in Tokushima University Hospital. As to the neuroretinal findings, slight opacities and pigmentation of macula were found in 3 cases, and slight arterio-sclerosis were observed in 4 cases. as well as chronic dermatitis (Drs. M. Seki and T. In general, it is still early to decide whether Yoneyama) (Plates 2 and 3). These findings are similar to those observed in the Marshallese”. these abnormalities in the exposed persons were late effects of the exposure in 1954 or not. Precise In two cases who showed complete epilation, observations should be continued. small alopecias were still observed CT-2 and 7). Thin hairs grew in the area. In T-7, vrev hairs seemed to be much comparing with age. Besides those area, residual beta burns were observed in smal] area of wrists (T-6 and K-7), leg Haematological Examinations The results of haematological examinations are presented in Table 4. a. Peripheral blood Leucocytes: Leucocyte numbers were distributed between 4,200 and 9,400. D. Ophthalmological Examinations Ophthalmological examinations were carried out on 14 hospitalized persons and 3 outpatients Neutraphils: Numbers of neutrophils were in normal range in all the cases except Case T-3. Obvious shift to the left of nuclei was not found. by Dr. & Kubota, National Hospital of Chiba, Lymphocytes: Numbers of lymphocytes were and Dr. N. Hirota, Yaizu City Hospital, respectively. The results are presented in Table 53. over 2,000 in all the cases except Case T-6 which showed lymphocyte level below 2,000 in every examination. Losinophils: Case K-2 showed eosinophilia which had continued since acute stage. No sign of parasite was proved. Basophils: As to basophils, the rate to 3,000 leucocytes was calculated (Table 5). Comparing with that of normal persons, slightly high percentage of basophils was observed in Case K-2 and Case K-9. The latter showed similar rate in 1961 survey. Monocytes: No pathological data was obtained on these cells. T-3, K-5 and K~4 were chosen as representing cases at the acute stage with signs and symptoms of marked degree, of moderate degree, and of minimal degree, respectively. Table 3. Ophthalmological Examinations Pterygium and pinguecula.-..-- 9 (T-3, T-8, K-2, K-4, K-5, K-8, K-11, K-13, K-16) Corneal pigment: --:ssere-ceeseeeees 3 (K-2, K-4, K-10) Vasculalisation -:--+eesseeeseeeeee 2 (K-4+, K-13) Keratitis diffusa--+---.---ceeeesseee 2 (T-3, K-5) Arcus Senilis ccccccsssesecccesenreuss I (K-1]) Lenticularapacities s--cererreers 7 (T-2, T-3, T-6, T-7, K-5, K-11, K-16) VIULTEUS OPAcities ce-ereereereereees 1 (K-8) Macular Retinal degeneration.-------+++- 3 (T-3, K-2, K-55 arteriosclerosis «+--+... 5 (T-2, K-4, K-5. K-6, K-99) Strabismus ccsececesseesercccesscseene 2 (K-4, K-10) Pterygium and pinguecula were observed in 9 persons. Corneal pigmentation was proved in 3 cases. Lenticular opacities were noted in 7 cases; 7. e. Cases T-2 and T-7 showed slight opacity of posterior capsule, cases T~3, K-5 and K-11 had opacities of subcortices. Case K-16 showed slight opacities of posterior cortex. Cataracta The changes of WBC, neutrophils and lymphocytes are illustrated in Fig. 6-A, B and C. T-3 showed slightly decreased values. Considering the myelogram of T-3, a slight maturation arrest of myeloid cells might exist. Platelets: Platelets counts (130~510 x 10°) were normal. Erythropotetic elements: Between the exposed ee enee external ears CT-2,7,8 and K-6), foot and (K-8). E.