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RERF's Research

Matters elucidated thus far

1. Cancers of specific organs have increased among A-bomb survivors.

2. Non-cancer diseases (cataract, benign thyroid tumor, heart disease, stroke, etc.) have also increased among survivors exposed to high doses of radiation.
3. Survivors exposed to high doses of radiation tend to show deterioration of the immune system similar to that observed with aging.
4. Many survivors exposed to high doses of radiation exhibit minor inflammatory reactions.
5. Research thus far has not indicated any genetic effects in A-bomb survivors' children.

6. Observations made to date have not confirmed increased mortality or cancer incidence among A-bomb survivors' children.

Cancers with increased incidence among A-bomb survivors

In addition to deaths from leukemia, deaths from thyroid, breast, lung, colon, and stomach cancers are known to have increased. On the other hand, however, some cancers, such as of the uterus, pancreas, prostate, and others, have not increased.
Relative risk of death due to cancer
at 1 Sv of radiation exposure (1950-1997)
Site
Relative risk
Leukemia
5.6
All cancers (excluding leukemia)
1.5
  Esophageal cancer
2.2
  Stomach cancer
1.4
  Colon cancer
1.5
  Lung cancer
1.8
  Breast cancer
1.8
  Urinary bladder cancer
2.2
Note: Average relative risk for survivors exposed at age 30, both sexes combined. Risk for leukemia based on data collected between 1950 and 1990.