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showed enlargement of the proximal and distal
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Poral
4. Unusual Skeletal Findings
As noted previously. hand and wrist x-rays had
shown congenital hypoplasia of the middie pha-
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lanx tn'some children The same condition was
noted im some of the adults (Figure 12). The muiddle phalanx of the fifth finger was shortened and
shehtly broadened ‘Uhis was found both unilaterally andbilaterally and was occasionally associated with lenethentng of the ulna Twenty subjects
showed definite changes, and some additional ones
2
Pentales
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Doral
2
interphalangeal pourts and ulnar des taden ol the
hand No thucimttocd nodules were present Phe
Sra changes were consistent witha diagnosis of
osteoarthritis of the hands. but there was no ext
dence for rheumatord arthrits [Lhe BRU was
negative Ehisas probably a case of osteoarthritis,
but rheamatord arthreas cannot be completely
ruled out
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had only moderate shortening of the phalanx
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DENTAL SURVEY
I
Majuro Children
2. Rheumatoid Factor in Sera
Thirty Majuro children were examined, ranging in age from 2 to 13 years andselected at ran-
The prevalence of sera positive for “rheumatord
factor” by the bentonite flocculation test (BEET is
shownin Lable t8 fndisidual data are fisted in
Appendix 6 according to age and sex Phe total
pres dence of postive sera tis not greatly different
from that reported for white Amertcan popula-
dom. Widespread cartes were present in 73'¢ of
the children <7 £2 vears old. Many erupting per-
meidence between the exposed and unexposed
males in the 7 to 9-vear age group Eruption time
of the bieuspids appeared advanced, possibly be cause of premature loss of the deciduous molars
tions There was no apparent dillerence in arthrits
groups
Three individuals, all in the unexposed
group, had definitely positive sera (Table 19), but
with no evidence of jotnt disease One ¢ 2295 $) had
bronchial asthma and prostatic hypertrophy, but
these findings. since they were common in the
population, were probably coincidental. There ts
ne apparent cxplanatton for the presence of rheuniatord factor in these individuals.
3. Clinical Evidence of Arthritis
A O4-sear-old male (2878) had some clinical
findings compatible with rheumatoid arthritis. He
had complained of pain and sweiling tn his hands,
wrists, and knees for 5 to LO vears, but with no
limitation of function. Physical examination
manent teeth showed retatnect root fragments in
the adjacent gingival crevice. Although the oral
hyeiene could be rated fatr to good, the incidence
of canes rematned high. Bunching of the lower
incisors was a common finding in males andfe-
All the children in this age group showedsigns of
retarded jaw development in comparison with
children in the continental United States.
Rongelap Children
No significant difference was found in caries
incidence, eruption time, and morphologyofthe
teeth, or growth of the jaws, between the exposed
and the unexposed children. In both groups about
20° showed retarded jaw development which had
resulted in narrowing of the arches plus bunching
ol the lower anterior teeth. The Rongelap children had a much lower incidence of caries than
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