Jane1967" No. 6
LATE EFFECTS OF RADIOACTIVE IODINE IN FALLOUT
1223
induced opacities of the lens noted in these
people as have been seen in cyclotron work-
_ers and the Japanese people exposed to the
bombs in Hiroshima and Nagasaki. However, the Marshallese people were not ex-
posed to any neutron irradiation, the relative biological effectiveness of neutron
radiation being much higher for cataract
formation.
One of the most important findings resulted from growth and development
studies of the children. These studies have
been carried out under the direction of
Dr. W. W. Sutow of the M. D. Anderson
Hospital. Extensive anthropometric measurements and skeletal maturation studies,
Peteneni
using X rays of the hand and wrist for bone
age, have been carried out over the years
since exposure (11). It appears that there
has been retardation of growth in some
children, particularly boys exposed at less
than 5 years of age. “The growth retardation
was most marked in two boys exposed 15_
to 18 months of age. Figure.8. shdws these -
3
two retarded boys. Figure 9 shows the la
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showing greatest
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in skeletal age in boys exposed at less than “: growgh retardation. No obvious mental retardation
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5 years of age gompared with the unexposed was poted. «Se
boys. In the females the lagwasless marked; - Rgfigelap people,at 40 year postexposure.
mHerman Liscé and his group in Boston
I will have more *© say,@bout growth. re
a Ain: . (whe. are. ga ing out the chromosome
tardation shortly.
Weobtained successful peripherak, God? analysis forfis) telFme that alow prevaléice
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the; ofchromosomal aberrations still pétsists.
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AGE AT EXPOSURE (YRS)
FiGuRE 9. Comparison of skeletal age (SA) and chronological age (CA), 1961 and 1962
(pooled data).