Causes of Cancer


incl. from medical and dental x-ray and radionuclide exams

by © 2004–2023

"My recent study (Radiation from Medical Procedures, 699 pages) provides the first powerful evidence that the U.S. population's accumulated exposure to medical x-rays is a necessary co-actor in causing over half the deaths from cancer, and over half the deaths also from ischemic (coronary) heart disease. Since the study's publication in November 1999, no one has shown that it overestimates the impact of x-rays in causing cancer and coronary heart disease. Some people say 'it must be an overestimate,' but they have never shown how. Some of the critics have never even looked at the study."
John W. Gofman, M.D., Ph.D.

According to Dr. Gofman “X-rays are a proven cause of human cancer. It is doubtful that you can find any cancer biologists who would deny that statement. Much of the proof comes from the study of people who accumulated their x-ray exposure from multiple exposures, with each exposure received at extremely low doses.

Every year, over 200 million diagnostic medical x-ray exams, 100 million dental x-ray exams, and 7 million diagnostic radionuclide exams are administered in the USA (population: 270 million people)...

In the 'War on Cancer,' there is a big hole. Why are x-rays — an undisputed cause of cancer — rarely mentioned? Why is there no agency or organization dedicated to reducing exposure to x-rays, to the lowest levels at which it is technically possible to acquire good images?

It is demonstrably feasible to reduce x-ray dose per x-ray procedure, probably to half on the average, without any loss of image-quality and without the purchase of major new equipment.”

Example mammography (which leads to an increased breast cancer risk):

“Young women with Hodgkin's disease treated with high levels of radiation to the chest are much more likely to develop secondary breast cancer than women on less aggressive radiation regimes, according to a study released on Tuesday. The study found that the breast cancer risk was eight times higher among women exposed to the highest levels of radiation than women who were given the smallest doses, where those women were treated before age 30.”

Two quotes from “Preventing Breast Cancer: The Story of a Major, Proven, Preventable Cause of This Disease” (1995) by John W. Gofman, M.D., Ph.D., Committee for Nuclear Responsibility, P.O. Box 421993, San Francisco, CA 94142:

  • "Our current estimate is that about 75% of the current annual incidence of breast cancer in the U.S. is being caused by earlier ionizing radiation, primarily from medical sources."
  • "Mammography — radiation-induced breast cancer."

More on radiation as a cancer cause


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