The Characterization of Chernobyl Findings by Fukushima Medical University’s Thyroid Survey

The Fukushima Prefectural Health Management Survey examines the thyroid glands of children subject to exposures as a result of the Fukushima Diiachi nuclear accident.

The Fukushima Prefectural Health Management Survey Review Committee issues reports and its staff communicate with residents and the press.

The Fukushima Medical University takes the lead role in the survey. Dr. S. Yamashita previously headed the team engaged in the survey. The current head is Dr. Suzuki.

The staff of FMU have often been quoted in the press. These staff frequently state that Chernobyl data shows that 1. the latent period for Thyroid cancer is 4 – 5 years. 2. the progression of disease was slow in the case of the Chernobyl children.

The following quotations give examples of the characterization given to the Chernobyl findings by Fukushima Medical University and Health Management Survey Staff:

“Researchers at Fukushima Medical University, which has been taking the leading role in the study, have said they do not believe the most recent cases are related to the nuclear crisis.”

They point out that thyroid cancer cases were not found among children hit by the 1986 Chernobyl nuclear accident until four to five years later.” end quote.
Japan Times. Kyodo. 06/05/2013

Further : “…experts at Fukushima Medical University said that it is too early to link the cancer cases to the nuclear disaster. They said the 1986 Chernobyl accident showed that it takes at least four to five years before thyroid cancer is detected.” Source: Thyroid cancer hits Fukushima 5 Jun 2013, 12:57 pm – Source: AAP, SBS TV Australia,

What does the Chernobyl data show?

1. Childhood thyroid cancer: comparison of Japan and Belarus.
Shirahige Y, Ito M, Ashizawa K, Motomura T, Yokoyama N, Namba H, Fukata S, Yokozawa T, Ishikawa N, Mimura T, Yamashita S, Sekine I, Kuma K, Ito K, Nagataki S.
First Department of Internal Medicine, Nagasaki University School of Medicine, Japan.
Endocr J. 1998 Apr;45(2):203-9. Free Full Text.

This source states: “The high incidence of childhood thyroid cancer in Belarus is suspected to be due to radiation exposure after the Chernobyl reactor accident” (Abstract) (pdf page 2, journal page 204).

“All of the preceding thyroid carcinomas developed after longer latency periods,
whereas tumors arising in the Chernobyl population began developing with surprising rapidity and short latency.” (pdf page 2, journal page 204).

The authors cite the Chernobyl-Sasakawa Health and Medical Cooperation Project as a source in the Abstract. The public data published by this organization is Chernobyl A Decade – Proceedings of the Fifth Chernobyl Sasakawa Medical Cooperation Symposium, Kiev, Ukraine, 14-15 October 1996 (International Congress S.) Shunichi Yamashita (Edited by), Yoshisada Shibata (Edited by)
The publication is available at :

2. Chernobyl Radiation-induced Thyroid Cancers in Belarus
Mikhail V. MALKO
Joint Institute of Power and Nuclear Research, National Academy of Sciences of Belarus Krasin Str. 99, Minsk, Sosny, 220109, Republic
of Belarus
QUOTE: ” absence of marked latency period is another feature of radiation-induced thyroid cancers caused in Belarus as a result of this accident. “

3. “Minimum Latency & Types or Categories of Cancer” John Howard, M.D., Administrator World Trade Center Health Program, 9.11 Monitoring and Treatment, Revision: May 1, 2013, states that the latent period for Thyroid cancer is :
“2.5 years, based on low estimates used for lifetime risk modeling of low-level ionizing radiation studies”, pdf page 1.

4. Latency Period of Thyroid Neoplasia After Radiation Exposure
Shoichi Kikuchi, MD, PhD, Nancy D. Perrier, MD, Philip Ituarte, PhD, MPH, Allan E. Siperstein, MD, Quan-Yang Duh, MD, and Orlo H. Clark, MD

From the From Department of Surgery, UCSF Affiliated Hospitals, San Francisco, California.

“Latency Period of Benign and Malignant Thyroid Tumors

Although some sporadic tumors unrelated to radiation may be included among our patients, the shortest latency period for both benign and malignant tumors was 1 year as occurred in 3 patients, whereas the longest time was 69 and 58 years, respectively (Fig. 1).” As published in Journal List nAnn Surg v.239(4); Apr 2004 PMC1356259, available full text at

5. Thyroid cancers after the Chernobyl accident;
Chernobyl accident; lessons learnt, an update. 2010.
Sir Dillwyn Williams

“Tumours are becoming less aggressive” Williams, as above, 2010. (ie late onset)

2010 was 24 years after the exposure events caused by the Chernobyl disaster.

2013 is 2.5 years after the Fukushima Diiachi disaster exposure period commenced.

On the basis of the evidence presented above I ask the following question:

Do the staff of Fukushima Prefectural Health Management Survey, Fukushima Prefectural Health Management Survey Review Committee, Fukushima Medical University, Doctor S. Yamashita and Dr Suzuki characterize the Chernobyl Findings in a manner which contradicts the actual findings of those relevant Chernobyl related peer reviewed, qualified, published papers?
If so, why?

Further, Williams, Cambridge, as cited above provides data which shows that the form of the disease varies in it’s nature according to dose. The minimum dose band, like the other dose bands, remains associated with exposures due to the Chernobyl disaster.

For more detail and information on the papers, please the previous post at

Please also see the source documents cited above at the links given.

My comments on this post and the preceding post are copyright waived. My comments are not of great importance. What is of great importance are the source documents and the deviancy shown by the relevant authorities who have apparently mis-characterized the ?Chernobyl experience for the last 2.5 years.

If anyone knows how to get this to Lawyer Ido in Fukushima, please forward the link to him.

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