54 EFFECTS OF IONIZING RADIATION Table 4.8——Hematocrit, All Exposure Groups Grover I Day Group II <1s* (M) >15(M) 37.5 a 43. 9 _--- 39. 0 _one 26 28 29 30 33 39 43 47 185 36. 3 Wee a--37.9 37. 4 37.8 37.3 39.0 38. 0 41,6 -eue -e ae 42, 2 42. 2 42. 4 41.8 43.4 41.7 Controls____| 39.6 46. 0 22 23 | | ATESSES| caso) Group IV Grove III >iscmy AMASES cascm) >is cary AMEAGES Aptits 37.5 aoee 43. 7 _ooe 39. 2 _ooe -aoe _ooe ween ae aoee ae -a.45.7 37.5 _oee _oue 37. 1 36. 8 37. 4 37. 6 38. 3 38. 2 36. 5 -o-e _oue 36. 0 35. 5 36. 0 wenn -oue 37.5 43. 2 _-oe -u-e 44. 6 43. 8 45. 2 46. 5 noes 40. 1 36. 8 _ooe ae 36. 7 37.3 36, 8 40. 2 ~eee 37.3 ee _oue 39. 9 uu -oae _--_--aoe _oee neon _ooe 45, 1 _aueee ---e ---a a -a-oe 39. 4 a a -o-~oee wae a oe 44.5 a -a-45. 4 46. 7 44.0 a -o-- 39. 9 39. 6 46. 0 39.9 39. 6 46. 0 39. 9 44.9 *Age in years, (M) = Male. (F) = Female. 4.37 Morphology of Peripheral Blood Significant morphological cellular changes, with the exception of abnormal mononuclear cells* seen in several individuals during the period of most severe neutropenia, were not observed. Apparently similarcells have been observed previously by Minot and Spurling (11). Complete evaluation of these changes would necessitate an exhaustive serial study of the hematologyslides. Similar differences of opinion are reportedin the literature. 4,38 Comparison of Hematological Findings in Children and Adults, Group I. It is seen from Table 4.2 to 4.4 and Figures 4.1, 4.2 and 4.4 that differences in the degree of *There was considerable difference in opinion with respect to classification of these cells. They were classified as atypical monocytes, degenerating Iymphocytes, atypical myelocytes, monocytoid lymphocytes and lymphocytes in transition to myelocytes. At the time of this report there was no unanimity of epinion with respect to classification and significance of these cells, depression of cellular elements were present between children and adults. In Table 4.9, the mean values of the neutrophile, lymphocyte and platelet counts at time of peak depression for each element are given in terms of absolute count and percent of appropriate control value (mean platelet counts were calculated for the less than 5 and greater than 5 age groups for this comparison). Table 4.9.—Comparison by Age of Mean Neutrophile, Lymphocyte and Plarelet Counts in Group I (Rongelap) at the time of Peak Depression ABSOLUTE COUNT X10 PEROL TYPE OF CELL __ AGE<5 ; Neutrophile ___ Lymphoeyte. __ 96 | AGE<5 | 2.7 2.9 Platelets (females only)..._.__| AGE>5 3. 1 2.2 120 56 40 23 AGE>S5 | | 64 54 34