*
C
(
TABLE 1
Thyroid Lesions in Marshallese, April 1976
Group
Rongelap exposed
(175 rads)
‘Age at
Est. thyroid
to Subjects” with]
< 10
10-18°
810-1150
335-810
89.5 (17/19)
25.0 (3/12)
15
1
556°
35.9 (23/64)
19
exposure
> 18
All
Ailingnae exposed
(69 rads)
< 10
10-18
> 18
All
In utero exposed
Utirik exposed
(14 rads)
jRongelap unexposed
,
I
< 10
10-18
> 18
All
< 10
10-18
> 18
All
dose,
335
rads
thyroid lesions
9.1 (3/33)¢
275-450
190
135
217¢
33.3
0.0
36.3
33.3
175+?
69+?
33.3 (1/3)
0.0 (0/1)
60-95.
27-60
27
50¢
No. subjects|
with surgery]
1.7
9.5
9.0
6.4
(2/6)
(0/1)
(4/11)
(6/18)
(1/58)
(2/21)
(7/78)
(10/157)
0.0 (0/72)
15.4 (2/15)
7-4 (9/122)
6.1 (2/33)
4.7 (3/64)
£
1
0
1
1
3
4
1.7 (1/58)
4.8 (1/21)
1.3 (2/157)
0
1
2
5.3 (11/209)
3
Likiep unexposed
< 10
> 10
All
0.0 (0/31)
4.7 (5/106)
3.6 (5/137)
0
0
0
Wotje unexposed
< 10
> 10
3.4 (3/88)
5.7 (4/70)
0
0
All unexposed
5.3 (1/19)
3
1
0
3
4
% Subjects” wit!
malignant lesio:
All
4.4 (7/158)
0
< 10
> 10
All
1.6 (3/191)
6.4 (20/313).
4.6 (23/504)
0
0
0
= Dose from 131, 132, | 133, | and 1355 plus gamma; mean dose extrapolated from calculations~°
for adults and 3-year olds (see Section II).
b Based on number of people exposed, excluding those in utero (number of cases/total number
in group).
“ The thyroid is considered to be fully developed by about age 18,
d
One additional case of adenoma, found at autopsy, not included here.
© Weighted mean dose.
£
Pathologists differed as to whether this lesion was malignant; it was scored as benign.