文献一覧: Susumu Yokoya (著者)

24 0 0 0 OA A Comprehensive Review of the Progress and Evaluation of the Thyroid Ultrasound Examination Program, the Fukushima Health Management Survey

著者: Hiroki Shimura Satoru Suzuki Susumu Yokoya Manabu Iwadate Satoshi Suzuki Takashi Matsuzuka Noriko Setou Tetsuya Ohira Seiji Yasumura Shinichi Suzuki Hitoshi Ohto Kenji Kamiya Thyroid Ultrasound Examination Group
出版者: Japan Epidemiological Association
雑誌: Journal of Epidemiology (ISSN:09175040)
巻号頁・発行日: vol.32, no.Supplement_XII, pp.S23-S35, 2022-12-05 (Released:2022-12-05)
参考文献数: 71
被引用文献数: 3 8

The Great East Japan Earthquake on March 11, 2011, and the subsequent tsunami caused an accident at the Fukushima Daiichi Nuclear Power Plant, in which extensive damage to the nuclear power reactors resulted in massive radioactive contamination. Fukushima Prefecture implemented the Thyroid Ultrasound Examination (TUE) program as part of the Fukushima Health Management Survey project in response to residents’ anxieties about health risks due to radiation exposure for residents aged 0–18 years at the time of the nuclear accident. This program consisted of the primary examination and the confirmatory examination. In the primary examination, thyroid nodules and cysts were examined using portable ultrasound apparatuses. The confirmatory examination was performed to have clinical or cytological diagnosis. As of June 30, 2021, 116, 71, 31, 36, and 9 examinees in the first, second, third, and fourth round of surveys, and the survey at age 25 years, respectively, were determined to have nodules cytologically diagnosed as malignant or suspicious for malignancy. The confirmatory examination of the fourth-round survey and the primary and confirmatory examination of fifth-round survey are currently in progress. Together with the low thyroid absorbed radiation dose estimated in the United Nations Scientific Committee on the Effects of Atomic Radiation 2020 report, our results suggested that the increased incidence of childhood thyroid cancer in Fukushima Prefecture was not caused by radiation exposure, but rather by the highly sensitive detection method. As detailed in this review, there were ongoing challenges in our program, such as actions against the risk of overdiagnosis and psychological support for participants and their families.

20 0 0 0 OA Cytological examination of the thyroid in children and adolescents after the Fukushima Nuclear Power Plant accident: the Fukushima Health Management Survey

著者: Atsuhiko Sakamoto Takashi Matsuzuka Yukie Yamaya Satoru Suzuki Manabu Iwadate Satoshi Suzuki Yuko Hashimoto Osamu Suzuki Shinichi Suzuki Susumu Yokoya Tetsuya Ohira Seiji Yasumura Hitoshi Ohto Kenji Kamiya Hiroki Shimura
出版者: The Japan Endocrine Society
雑誌: Endocrine Journal (ISSN:09188959)
巻号頁・発行日: pp.EJ20-0235, (Released:2020-08-20)
被引用文献数: 1

The Fukushima Daiichi Nuclear Power Plant accident occurred on March 11 2011, following the Great East Japan Earthquake and tsunami. Radioactive materials, including I-131, were released into the environment after the accident. Shortly after, the prefectural government initiated the Fukushima Health Management Survey for monitoring the long-term health conditions of the residents of Fukushima Prefecture. In the survey, thyroid ultrasonography was scheduled for all people aged 18 years or younger who were living in Fukushima Prefecture at the time of disaster. The total number of examinees was approximately 370,000 in the Preliminary Baseline Survey (PBLS), and 380,000 in the first Full-scale Survey (FSS). First, thyroid ultrasonography was performed as the Primary Examination. When a thyroid nodule that meets the fine needle aspiration cytology (FNAC) guideline is detected, thyroid FNAC is performed. By the end of June 2017, the cytological specimens of 187 examinees had been interpreted as Malignant or Suspicious for Malignancy (SFM). In this article, the cytological results of whole categories are presented using the criteria of The Bethesda System for Reporting Thyroid Cytopathology. The total numbers of examinees with SFM or Malignant in PBLS and at the first FSS were 106 (62.0%) and 71 (38.0%), respectively. The data of the cytological results of SFM and Malignant were already reported. However, this is the first report of cytological data from categories other than SFM and Malignant. The results of the current study will contribute to future research into the thyroid conditions of children and adolescents.

2022-04-13 10:11:30
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6 0 0 0 OA Investigation of thyroid cancer cases that were not detected in the Thyroid Ultrasound Examination program of the Fukushima Health Management Survey but diagnosed at Fukushima Medical University Hospital

著者: Susumu Yokoya Manabu Iwadate Hiroki Shimura Satoru Suzuki Takashi Matsuzuka Satoshi Suzuki Shigeyuki Murono Seiji Yasumura Kenji Kamiya Yuko Hashimoto Shin-Ichi Suzuki
出版者: THE FUKUSHIMA SOCIETY OF MEDICAL SCIENCE
雑誌: FUKUSHIMA JOURNAL OF MEDICAL SCIENCE (ISSN:00162590)
巻号頁・発行日: pp.2019-26, (Released:2019-12-13)
参考文献数: 12
被引用文献数: 2

The Great East Japan Earthquake, which occurred on March 11, 2011, and its subsequent Fukushima Daiichi Nuclear Power Plant accident, prompted implementation of the Thyroid Ultrasound Examination (TUE) program as a part of the Fukushima Health Management Survey. The purpose of this program is to support residents of Fukushima Prefecture, and to analyze the health effects of the released radionuclides. Regardless of relatively high participation rates and a well-planned diagnostic flow, it is conceivable that not all thyroid cancer cases can be detected by the TUE program. The aims of the present study were to identify and characterize these “outside” cases, targeting patients at Fukushima Medical University (FMU) Hospital. As of June 30, 2017, we have successfully identified 11 outside cases. These corresponded to 5.7% of the 194 subjects who were identified as having thyroid cancer or suspected thyroid cancer in the TUE program. Although the outside subjects of other institutes were not investigated, the present study may have identified the majority of outside subjects in Japan, considering that FMU Hospital treats a large number of thyroid cancer subjects. Furthermore, the characteristics of the 11 subjects were not different from those of the subjects identified in the TUE program. These findings confirm that the TUE program was able to identify subjects of thyroid cancer adequately and sufficiently.

2020-08-24 14:27:35
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5 0 0 0 OA Investigation of thyroid cancer cases that were not detected in the Thyroid Ultrasound Examination program of the Fukushima Health Management Survey but diagnosed at Fukushima Medical University Hospital

著者: Susumu Yokoya Manabu Iwadate Hiroki Shimura Satoru Suzuki Takashi Matsuzuka Satoshi Suzuki Shigeyuki Murono Seiji Yasumura Kenji Kamiya Yuko Hashimoto Shin-Ichi Suzuki
出版者: THE FUKUSHIMA SOCIETY OF MEDICAL SCIENCE
雑誌: FUKUSHIMA JOURNAL OF MEDICAL SCIENCE (ISSN:00162590)
巻号頁・発行日: vol.65, no.3, pp.122-127, 2019 (Released:2020-01-09)
参考文献数: 12
被引用文献数: 2

2020-08-24 14:27:37
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4 0 0 0 OA Cytological examination of the thyroid in children and adolescents after the Fukushima Nuclear Power Plant accident: the Fukushima Health Management Survey

著者: Atsuhiko Sakamoto Takashi Matsuzuka Yukie Yamaya Satoru Suzuki Manabu Iwadate Satoshi Suzuki Yuko Hashimoto Osamu Suzuki Shinichi Suzuki Susumu Yokoya Tetsuya Ohira Seiji Yasumura Hitoshi Ohto Kenji Kamiya Hiroki Shimura
出版者: The Japan Endocrine Society
雑誌: Endocrine Journal (ISSN:09188959)
巻号頁・発行日: vol.67, no.12, pp.1233-1238, 2020 (Released:2020-12-28)
参考文献数: 30
被引用文献数: 1

2021-01-08 13:52:58
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2 0 0 0 OA Revisiting the Geographical Distribution of Thyroid Cancer Incidence in Fukushima Prefecture: Analysis of Data From the Second- and Third-round Thyroid Ultrasound Examination

著者: Tomoki Nakaya Kunihiko Takahashi Hideto Takahashi Seiji Yasumura Tetsuya Ohira Hiroki Shimura Satoru Suzuki Satoshi Suzuki Manabu Iwadate Susumu Yokoya Hitoshi Ohto Kenji Kamiya
出版者: Japan Epidemiological Association
雑誌: Journal of Epidemiology (ISSN:09175040)
巻号頁・発行日: vol.32, no.Supplement_XII, pp.S76-S83, 2022-12-05 (Released:2022-12-05)
参考文献数: 31
被引用文献数: 2 4

Background: After the first-round (Preliminary Baseline Survey) ultrasound-based examination for thyroid cancer in response to the accident at the Fukushima Daiichi Nuclear Power Plant in 2011, two rounds of surveys (Full-scale Survey) have been carried out in Fukushima Prefecture. Using the data from these surveys, the geographical distribution of thyroid cancer incidence over 6 or 7 years after the disaster was examined.Methods: Children and adolescents who underwent the ultrasound-based examinations in the second- and/or third-round (Full-scale) survey in addition to the first-round survey were included. With a discrete survival model, we computed age, sex, and body mass index standardized incidence ratios (SIRs) for municipalities. Then, we employed spatial statistics to assess geographic clustering tendency in SIRs and Poisson regression to assess the association of SIRs with the municipal average absorbed dose to the thyroid gland at the 59-municipality level.Results: Throughout the second- and third-round surveys, 99 thyroid cancer cases were diagnosed in the study population of 252,502 individuals. Both flexibly shaped spatial scan statistics and maximized excess events test did not detect statistically significant spatial clustering (P = 0.17 and 0.54, respectively). Poisson regression showed no significant dose-response relationship: the estimated relative risks of lowest, middle-low, middle-high, and highest areas were 1.16 (95% confidence interval [CI], 0.52–2.59), 0.55 (95% CI, 0.31–0.97), 1.05 (95% CI, 0.79–1.40), and 1.24 (95% CI, 0.89–1.74).Conclusion: There was no statistical support for geographic clustering or regional association with radiation dose measures of the thyroid cancer incidence in the cohort followed up to the third-round survey (fiscal years 2016–2017) in Fukushima Prefecture.

2023-02-01 07:49:24
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2 0 0 0 OA Standardization of Blood Growth Hormone Levels Measured by Different Kits Using a Linear Structural Relationship

著者: Tomohiro Saito Katsuhiko Tachibana Akira Shimatsu Noriyuki Katsumata Naomi Hizuka Kenji Fujieda Susumu Yokoya Toshiaki Tanaka
出版者: The Japanese Society for Pediatric Endocrinology
雑誌: Clinical Pediatric Endocrinology (ISSN:09185739)
巻号頁・発行日: vol.15, no.3, pp.79-84, 2006 (Released:2006-08-02)
参考文献数: 8
被引用文献数: 1 3

Accurate and reliable determination of blood growth hormone level is essential in the diagnosis and treatment of short stature children. However, measured levels differed considerably among measurement kits available in Japan until 2003. Therefore, standardization of the measured values was attempted by measuring growth hormone levels in a sample of healthy adult individuals every year using the different kits. A standardization equation was developed for each kit through linear structural relationship with the mean values of the used kits and measured values in each kit as random variables. A Pearson's correlation coefficient between the mean values of all kits and the measured values from each kit was also obtained. Sources for the marked discrepancies amongst the measured values in the different kits were also explored. The obtained values for slopes and intercepts in the equations varied considerably, but the standard values obtained from these equations after the measured values for each kit were transformed into standard values served well as the standard. The standard solutions in the respective measurement kits were found to be the source of variability in the measured values among the kits.

2020-05-12 21:08:08
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1 0 0 0 OA Pharmacokinetics and Metabolic Effects of High-Dose Growth Hormone Administration in Healthy Adult Men

著者: TOSHIAKI TANAKA YOSHIKI SEINO KENJI FUJIEDA YUTAKA IGARASHI SUSUMU YOKOYA KATSUHIKO TACHIBANA YUNOSUKE OGAWA
出版者: The Japan Endocrine Society
雑誌: Endocrine Journal (ISSN:09188959)
巻号頁・発行日: vol.46, no.4, pp.605-612, 1999 (Released:2006-11-25)
参考文献数: 20
被引用文献数: 4 5

To evaluate pharmacokinetics of growth hormone (GH) and its effects on IGF-I, glucose, insulin, nonesterified fatty acid (NEFA) and riglyceride (TG), fifteen Japanese healthy adult male volunteers (20-27 years old) were studied. The subjects were divided into three groups, and received with a single s.c. injection of 0.075, 0.15 and 0.30IU/kg of GH, respectively. The subjects assigned to receive 0.30IU/kg were administered for additional 6 days. After a single administration of GH, Cmax and AUC of GH were increased in a dose-dependent manner. There was a significant positive correlation between the AUC and the T1/2 (r=0.516, P<0.05). Total body clearance was significantly greater in 0.075IU/kg group than the other groups and showed a significant negative correlation with Cmax (r=-0.694, P<0.005) and AUC (r=-0.723, P<0.005). After a single administration of each dose, serum IGF-I concentrations were increased gradually. In the repeated administered group (0.30IU/kg), IGF-I concentrations almost reached a plateau at a significantly high level four days after the start of administration and remained at a high level (786-405.4ng/ml) until day 8. There was no significant difference in diurnal change of blood glucose and serum insulin after a single administration of GH among three groups. In the 0.3U/kg group, there was no significant difference in diurnal change of blood glucose between day 1 and day 7, but serum insulin level was significantly higher in day 7 than in day 1 (P<0.01). Serum concentrations of NEFA were increased over time after administration in all subjects administered once or repeatedly. TG concentrations showed no changes after single administration of each dose level, but were significantly increased on day 7 in the subjects repeatedly treated with 0.30 IU/kg/day. This effect is speculated to be caused by high dose GH treatment. The above findings demonstrated that higher GH dose significantly influences on carbohydrate and lipid metablism. It remains necessary to elucidate what kinds of effects of the long-lasting increased levels of insulin and triglyceride, even if reversible, would have on glucose and lipid metabolism.

2021-11-24 17:30:08
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1 0 0 0 OA Cryptorchidism after the Fukushima Daiichi Nuclear Power Plant accident:causation or coincidence?

著者: Yoshiyuki Kojima Susumu Yokoya Noriaki Kurita Takayuki Idaka Tetsuo Ishikawa Hideaki Tanaka Yoshiko Ezawa Hitoshi Ohto
出版者: THE FUKUSHIMA SOCIETY OF MEDICAL SCIENCE
雑誌: FUKUSHIMA JOURNAL OF MEDICAL SCIENCE (ISSN:00162590)
巻号頁・発行日: vol.65, no.3, pp.76-98, 2019 (Released:2020-01-09)
参考文献数: 116
被引用文献数: 8

Cryptorchidism (undescended testes) is among the most common congenital diseases in male children. Although many factors have been linked to the incidence of cryptorchidism, and testicular androgen plays a key role in its pathogenesis, the cause remains unknown in most cases. Recently, a Japanese group published a speculative paper entitled, “Nationwide increase in cryptorchidism after the Fukushima nuclear accident.” Although the authors implicated radionuclides emitted from the Fukushima accident as contributing to an increased incidence of cryptorchidism, they failed to establish biological plausibility for their hypothesis, and glossed over an abundance of evidence and expert opinion to the contrary. We assessed the adequacy of their study in terms of design setting, data analysis, and its conclusion from various perspectives. Numerous factors must be considered, including genetic, environmental, maternal/fetal, and social factors associated with the reporting of cryptorchidism. Other investigators have established that the doses of external and internal radiation exposure in both Fukushima prefecture and the whole of Japan after the accident are too low to affect testicular descent during fetal periods;thus, a putative association can be theoretically and empirically rejected. Alternative explanations exist for the reported estimates of increased cryptorchidism surgeries in the years following Japan’s 2011 earthquake, tsunami, and nuclear crisis. Data from independent sources cast doubt on the extent to which cryptorchidism increased, if at all. In any case, evidence that radionuclides from the Fukushima Daiichi Nuclear Power Plant could cause cryptorchidism is lacking.

2020-01-09 14:30:09
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