(AS OF MAY, 1974)
/
/
| Estimated
Age at
Marshall Island Group
Exposure
(radiation dose-gamma)
In-utero
<10
Rongelap (175 rads
gamma exposure)
11-16
>16
all
In NES§O
Rongelap (on Ailingne
Island -69 rads gamma
exposure)
>16
all
Utirik” (14 rads gamma
exposure)
Rongelap unexposed
-
7.48
aan mr
aan
an
Thyroid
Lesions
Percent
dose-rads
175 + ?
675 - 1440
335 - 675
335
-
9+?
300 - 480
Thyroid
Surgery -
Lesions
Percent
33.3 (1/3)
89.5 (17/19)
15
.
5.3 (1/19)
32.8 (21/64)
17
4.7 (3/64)
12.5 (1/8)
8.1 (3/37)
0.0 (0/1
33.3 (276
132
-
Malignant
1
3
5.4 (2/37)
16.6 (2/1
22.2 (4/18)
1
2
3
-
-
40,- 80
0.0 (0/53)
0
-
all
-
3.2 (5/157)
4
0.6 (1/157)
<10
-
0
-
22
5.8 (6/104)
1.6 (1/61)
>10
all
-
4.5 (6/133)
3.6 (7/194)
<10
>
-
0.0 (0/31)
4.7 (5/106)
all
Dose from
Thyroid ,
<10
>10
Likiep unexposed (1970)
i
TO FALLOUT
eo LESIONS IN MARSHALLESE, EXPOSgm
; .
/
-
3.6 (5/137)
4
2
2
. 0
0
0
1.0 (1/104)
-
-
-
.
rIhs 496, 297s *9"T plus gamma dose
Based on number of original people exposed.
in group.
e
In parentheses number of cases/total number
3mhe thyroid is considered fully developed by age 16.
4oifference of opinion as to whether or not one lesion was malignant.
was that it was benign.
Majority opinion
>the more energetic shorter-lived isotopes of iodine contributed less to the total
thyroid dose in the Utirik people due to later fallout. One might surmise also that the
biological effectiveness of the thyroid dose per rad would be less in that group.
Fifteen children 10-17 years of age at exposure in this group received estimated thyroid
doses between 22 and 40 rads.
"tn addition to thyroid lesions, one case of acute myelogenous leukemia was discovered
in September 1972 in a 19-year-old Rongelap boy who had received 175 rad gamma radiation
at one year of age.
He died November, 1972.