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Case report
Author
NOSO, Yoshihiro Department of General Medicine, Shimane University Faculty of Medicine, Izumo, 693-8501, Japan
TAKEICHI, Nobuo Department of General Medicine, Shimane University Faculty of Medicine, Izumo, 693-8501, Japan / Takeichi Clinic, Hiroshima, 732-0806, Japan / Hiroshima University, Research Institute for Radiation Biology and Medicine, Hiroshima, 734-8553, Japan
KIJIMA, Tsunetaka Department of General Medicine, Shimane University Faculty of Medicine, Izumo, 693-8501, Japan
YANAGISAWA, Yuko Funabashi Futawa Hospital, Funabashi, 274-0805, Japan
USHIYAMA, Motomi Sagami Seikyo Hospital, Sagamihara, 252-0303, Japan
SAWADA, Takashi Minatomachi Clinic, Yokohama, 221-0056, Japan
OISHI TANAKA, Yumiko Department of Radiology, Tsukuba University, Tsukuba, 305-8575, Japan
EGUCHI, Nobuko Hitachinaka General Hospital, Hitachinaka, 312-0057, Japan
NISHIO, Masamichi Hokkaido Cancer Center, Sapporo, 003-0804, Japan
OISHI, Mitsunobu Co-op Jyoso, Moriya, 302-0109, Japan
Ishibashi, Yutaka Department of General Medicine, Shimane University Faculty of Medicine, Izumo, 693-8501, Japan
INOUE, Ken Department of Public Health, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan
HOSHI, Masaharu Hiroshima University, Research Institute for Radiation Biology and Medicine, Hiroshima, 734-8553, Japan
Description
Similar to that in the Chernobyl nuclear accident, the occurrence of thyroid cancer in children was also feared following the Fukushima nuclear in Japan. Thyroid examination of children residing in the Fukushima Prefecture was performed quickly and nearly 200 cases or suspected cases of thyroid cancer have been reported. However, the thyroid glands of children evacuated from Fukushima and the hotspot area of Kanto have not been screened. Therefore, in response to requests from mothers outside Fukushima Prefecture, we started ultrasound examinations of the thyroid glands of children in October 2013. Since then, examinations have been performed annually until now. This report describes the results of these examinations performed through December 2017. The judgment standards for ultrasound examination of the thyroid gland were as indicated by Fukushima Prefectural University. Briefly, A1 judgment: without nodules or cysts, A2 judgment: with nodules measuring 5.0 mm or less or cysts measuring 20.0 mm or less, B judgment: nodules measuring 5.1 mm or more or cysts measuring 20.1 mm or more, and C judgment: requiring immediate secondary examination. Ultrasound examinations of the thyroid gland were conducted in the presence of family members and parents; in order to correctly convey the findings to the family, the findings were explained while viewing the images on the spot. Thyroid screening was conducted for residents of the Kanto hotspot for four years and a total of 8,171 people were examined. A1, A2, B, and C judgments were observed in 2,089 (25.6%), 5,969 (73.1%), 106 (1.3%), and 7 persons (0.1%), respectively. Nodules were noted in 226 patients (2.77%). At the time of the nuclear accident, pediatric thyroid ultrasonography was performed in a total of 7,693 children under 18 years of age. A1, A2, B, and C judgments were observed in 1,922 (25%), 5,735 (74.5%), B 34 (0.4%), and C two people (0.29%), respectively, and nodules were observed in 125 people (1.62%). The thyroid examinations were conducted annually by traveling through the hotspot. The number of A2 judgments increased each year, while the number of B judgments did not increase. There was also no increase in the number of C judgments. The results of screening in the Kanto hotspot area revealed that, contrary to the expectation based on reports after the Chernobyl nuclear accident, the frequent occurrence of childhood thyroid cancer was not observed.
Subject
Fukushima power plant accident
childhood thyroid examination
hotspot in Kanto
Journal Title
Shimane Journal of Medical Science
Volume
37
Issue
1
Start Page
31
End Page
41
ISSN
03865959
ISSN(Online)
24332410
Published Date
2020-03
NCID
AA00841586
Publisher
Faculty of Medicine, Shimane University
Publisher Aalternative
島根大学医学部
NII Type
Departmental Bulletin Paper
Format
PDF
Rights
Faculty of Medicine, Shimane University
Text Version
出版社版
OAI-PMH Set
Faculty of Medicine