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3. Cardiac angiosarcoma with metastatic to lung, brain, and bone

Author

Yamashita, Hiroshi, primary, Higashida, Tomohiko, additional, Huchioka, Aya, additional, Asakawa, Yasuma, additional, Nambu, Atsushi, additional, Ohyatsu, Sho, additional, Kohyama, Tadashi, additional, Takahashi, Mikiko, additional, Hayashi, Takaki, additional, and Tago, Masao, additional

Published
2024
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4. Present clinical practices of stereotactic irradiation for metastatic brain tumors in Japan: results of questionnaire survey of the Japanese Radiation Oncology Study Group (JROSG) working subgroup for neurological tumors

Author

Harada, Ken, Igaki, Hiroshi, Abe, Eisuke, Ariga, Takuro, Hayashi, Nobuyuki, Kanemoto, Ayae, Komiyama, Takafumi, Matsumoto, Yasuo, Nakano, Toshimichi, Onimaru, Rikiya, Saito, Hirotake, Sumi, Minako, Tago, Masao, Tanaka, Kensuke, Maebayashi, Katsuya, Aoyama, Hidefumi, and The Japanese Radiation Oncology Study Group (JROSG) Working Subgroup for Neurological Tumors

Published
2018
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5. Preoperative Radiation Response Evaluated by 18-Fluorodeoxyglucose Positron Emission Tomography Predicts Survival in Locally Advanced Rectal Cancer

Author

Nakagawa, Keiichi, Yamashita, Hideomi, Nakamura, Naoki, Igaki, Hiroshi, Tago, Masao, Hosoi, Yoshio, Momose, Toshimitsu, Ohtomo, Kuni, Muto, Tetsuichiro, and Nagawa, Hirokazu

Abstract

Purpose: This study focuses on the prognostic survival value of postirradiation metabolic activity in primary rectal cancer as measured with 18-fluorodeoxyglucose positron emission tomography. Methods: From July 1995 to March 2002, all 59 patients underwent two series of fluorodeoxyglucose positron emission tomography: one before preoperative radiation (standardized uptake values-1), and the other two to three weeks after radiation (standardized uptake values-2). Standardized uptake values-1 and standardized uptake values-2 correspond to before and after radiation, respectively. Results: In univariate analysis, the following emerged as significant prognostic variables: with or without residual tumor, pathologic differentiation, with or without recurrence, standardized uptake values-2, and with or without lymph node metastases. In multivariate analysis, residual tumor and standardized uptake values-2 were significant prognostic factors for survival. The median survival and the five-year overall survival rate comparing standardized uptake values-2 values <5 vs. >5 were 95 vs. 42 months and 70 vs. 44 percent, respectively (P = 0.042). Conclusion: A significant survival benefit was observed in patients with low fluorodeoxyglucose uptake after preoperative radiotherapy in primary tumors of rectal cancer.

Published
2024
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13. Japanese structure survey of radiation oncology in 2009 with special reference to designated cancer care hospitals

Author

Numasaki, Hodaka, Nishio, Masamichi, Ikeda, Hiroshi, Sekiguchi, Kenji, Kamikonya, Norihiko, Koizumi, Masahiko, Tago, Masao, Ando, Yutaka, Tsukamoto, Nobuhiro, Terahara, Atsuro, Nakamura, Katsumasa, Nishimura, Tetsuo, Murakami, Masao, Takahashi, Mitsuhiro, Teshima, Teruki, and Japanese Society for Therapeutic Radiology and Oncology Database Committee

Published
2013
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20. Japanese Structure Survey of Radiation Oncology in 2007 with Special Reference to Designated Cancer Care Hospitals

Author

Numasaki, Hodaka, Shibuya, Hitoshi, Nishio, Masamichi, Ikeda, Hiroshi, Sekiguchi, Kenji, Kamikonya, Norihiko, Koizumi, Masahiko, Tago, Masao, Ando, Yutaka, Tsukamoto, Nobuhiro, Terahara, Atsuro, Nakamura, Katsumasa, Mitsumori, Michihide, Nishimura, Tetsuo, Hareyama, Masato, Teshima, Teruki, and and of Committee, Japanese Society Therapeutic Radiology Oncology Database Committee

Published
2011
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23. Palliative brachytherapy and external beam radiotherapy for dysphagia from esophageal cancer: a nationwide survey in Japan

Author

Kawamoto, Terufumi, primary, Nakamura, Naoki, additional, Saito, Tetsuo, additional, Tonari, Ayako, additional, Wada, Hitoshi, additional, Harada, Hideyuki, additional, Kubota, Hikaru, additional, Nagakura, Hisayasu, additional, Heianna, Joichi, additional, Miyazawa, Kazunari, additional, Yamada, Kazunari, additional, Tago, Masao, additional, Fushiki, Masato, additional, Nozaki, Miwako, additional, Uchida, Nobue, additional, Araki, Norio, additional, Sekii, Shuhei, additional, Kosugi, Takashi, additional, Takahashi, Takeo, additional, and Shikama, Naoto, additional

Published
2021
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28. Practice patterns for postoperative radiation therapy in patients with metastases to the long bones: a survey of the Japanese Radiation Oncology Study Group

Author

Kubota, Hikaru, primary, Nakamura, Naoki, additional, Shikama, Naoto, additional, Tonari, Ayako, additional, Wada, Hitoshi, additional, Harada, Hideyuki, additional, Nagakura, Hisayasu, additional, Heianna, Joichi, additional, Ito, Kei, additional, Nozaki, Miwako, additional, Tago, Masao, additional, Fushiki, Masato, additional, Uchida, Nobue, additional, Araki, Norio, additional, Sekii, Shuhei, additional, Kosugi, Takashi, additional, Takahashi, Takeo, additional, Kawamoto, Terufumi, additional, Saito, Tetsuo, additional, and Yamada, Kazunari, additional

Published
2021
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30. The risk of hemorrhage after radiosurgery for cerebral arteriovenous malformations

Author

Maruyama, Keisuke, Kurita, Hiroki, Kawahara, Nobutaka, Kawamoto, Shunsuke, Shin, Masahiro, Morita, Akio, Tago, Masao, Kirino, Takaaki, and Kishimoto, Junji

Subjects
Hemorrhage -- Risk factors, Radiosurgery -- Methods, Arteriovenous malformations -- Care and treatment
Abstract

Patients with cerebral arteriovenous malformations who are treated with radiosurgery are studied and the rates of hemorrhage before radiosurgery, during latency period and after angiographic obliteration are assessed. It is found that radiosurgery significantly decreases the risk of hemorrhage in patients with cerebral arteriovenous malformations, even before there is angiographic evidence of obliteration, and that the risk of hemorrhage is further reduced after obliteration.

Published
2005

32. Practice Patterns for Postoperative Radiation Therapy in Patients with Metastases to the Long Bones: Survey of the Japanese Radiation Oncology Study Group

Author

Kubota, Hikaru, primary, Nakamura, Naoki, additional, Shikama, Naoto, additional, Tonari, Ayako, additional, Wada, Hitoshi, additional, Harada, Hideyuki, additional, Nagakura, Hisayasu, additional, Heianna, Joichi, additional, Ito, Kei, additional, Nozaki, Miwako, additional, Tago, Masao, additional, Fushiki, Masato, additional, Uchida, Nobue, additional, Araki, Norio, additional, Sekii, Shuhei, additional, Kosugi, Takashi, additional, Takahashi, Takeo, additional, Kawamoto, Terufumi, additional, Saito, Tetsuo, additional, and Yamada, Kazunari, additional

Published
2020
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41. Pulmonary focal fibrosis associated with microscopic arterio-venous fistula manifesting as focal ground-glass opacity on thin-section CT

Author

Sudo Noriko, Nambu Atsushi, Yamakawa Takana, Kawamoto Masashi, Fujino Shozo, Watanabe Masato, Mizuguchi Kunio, and Tago Masao

Subjects
Ground-glass opacity, Focal fibrosis, Lung, CT, Arterio-venous fistula, Diseases of the respiratory system, RC705-779
Abstract

Abstract Background Focal ground-glass opacity (GGO) on thin-section computed tomography (CT) may be seen in atypical adenomatous hyperplasia (AAH), adenocarcinoma in situ that has recently been renamed from bronchioloalveolar carcinoma (BAC) and various benign conditions. Case presentation We report a case of pulmonary focal fibrosis associated with microscopic arterio-venous fistula (AVF), which showed a focal area of GGO on thin-section CT. The patient was a 58-year-old woman with a GGO on thin-section CT which had increased in size over the period of 2 years. Slightly dilated vessels and thickened interlobular septa were also noted around the GGO. It was diagnosed preoperatively as adenocarcinoma in situ and a partial lung resection by video-assisted thoracic surgery (VATS) was performed. Pathological examination yielded a diagnosis of focal fibrosis associated with microscopic AVF. Conclusion We speculate that the focal fibrosis was produced by a prolonged congestion due to the AVF and that the dilated vessels and thickening of interlobular septa on thin-section CT related to the AVF. Microscopic AVF may be one of the etiologies of focal fibrosis showing focal GGO on thins-section CT. Dilated vessels and thickened interlobular septa around the GGO might offer a clue to the diagnosis of this disease entity. In addition, it should be noted that focal fibrosis may increase in size.

Published
2013
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47. Exceptionally high incidence of symptomatic grade 2–5 radiation pneumonitis after stereotactic radiation therapy for lung tumors

Author

Igaki Hiroshi, Tago Masao, Koyanagi Hiroki, Nakamura Naoki, Nakagawa Keiichi, Yamashita Hideomi, Shiraishi Kenshiro, Sasano Nakashi, and Ohtomo Kuni

Subjects
Medical physics. Medical radiology. Nuclear medicine, R895-920, Neoplasms. Tumors. Oncology. Including cancer and carcinogens, RC254-282
Abstract

Abstract Background To determine the usefulness of dose volume histogram (DVH) factors for predicting the occurrence of radiation pneumonitis (RP) after application of stereotactic radiation therapy (SRT) for lung tumors, DVH factors were measured before irradiation. Methods From May 2004 to April 2006, 25 patients were treated with SRT at the University of Tokyo Hospital. Eighteen patients had primary lung cancer and seven had metastatic lung cancer. SRT was given in 6–7 fields with an isocenter dose of 48 Gy in four fractions over 5–8 days by linear accelerator. Results Seven of the 25 patients suffered from RP of symptomatic grade 2–5 according to the NCI-CTC version 3.0. The overall incidence rate of RP grade2 or more was 29% at 18 months after completing SRT and three patients died from RP. RP occurred at significantly increased frequencies in patients with higher conformity index (CI) (p = 0.0394). Mean lung dose (MLD) showed a significant correlation with V5–V20 (irradiated lung volume) (p < 0.001) but showed no correlation with CI. RP did not statistically correlate with MLD. MLD had the strongest correlation with V5. Conclusion Even in SRT, when large volumes of lung parenchyma are irradiated to such high doses as the minimum dose within planning target volume, the incidence of lung toxicity can become high.

Published
2007
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49. Japanese structure survey of radiation oncology in 2012.

Author

Numasaki, Hodaka, Teshima, Teruki, Ando, Yutaka, Akuta, Keizo, Ikeda, Hiroshi, Okajima, Kaoru, Kumano, Tomoyasu, Sasaki, Tomonari, Sekiguchi, Kenji, Tago, Masao, Terahara, Atsuro, Nakamura, Katsumasa, Nishimura, Tetsuo, Ogawa, Kazuhiko, and Committee, for Society Japanese Radiation Oncology Database

Subjects
RADIATION, RADIOTHERAPY, ONCOLOGISTS
Abstract

This paper describes the ongoing structure of radiation oncology in Japan in terms of equipment, personnel, patient load and geographic distribution to identify and overcome any existing limitations. From March 2013 to August 2016, the Japanese Society for Radiation Oncology conducted a questionnaire based on the Japanese national structure survey of radiation oncology in 2012. Data were analyzed based on the institutional stratification by the annual number of new patients treated with radiotherapy per institution. The estimated annual numbers of new and total (new plus repeat) patients treated with radiation were 213 000 and 251 000, respectively. Additionally, the estimated cancer incidence was 865 238 cases with ~24.6% of all newly diagnosed patients being treated with radiation. The types and numbers of treatment devices actually used included linear accelerator (LINAC; n  = 864), telecobalt (n  = 0), Gamma Knife (n  = 44), 60Co remote afterloading system (RALS; n  = 23) and 192Ir RALS (n  = 130). The LINAC system used dual-energy functions in 651 units, 3D conformal radiotherapy functions in 759 and intensity-modulated radiotherapy (IMRT) functions in 466. There were 792 Japan Radiological Society/Japanese Society for Radiation Oncology-certified radiation oncologists, 1061.6 full-time equivalent (FTE) radiation oncologists, 2124.2 FTE radiotherapy technologists, 181.3 FTE medical physicists, 170.9 FTE radiotherapy quality managers and 841.5 FTE nurses. The frequency of IMRT use significantly increased during this time. In conclusion, the Japanese structure of radiation oncology has clearly improved in terms of equipment and utility although there was a shortage of personnel in 2012. [ABSTRACT FROM AUTHOR]

Published
2020
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50. Japanese Structure Survey of Radiation Oncology in 2011.

Author

Numasaki, Hodaka, Teshima, Teruki, Nishimura, Tetsuo, Akuta, Keizo, Ando, Yutaka, Ikeda, Hiroshi, Kamikonya, Norihiko, Koizumi, Masahiko, Sasaki, Tomonari, Sekiguchi, Kenji, Tago, Masao, Terahara, Atsuro, Nakamura, Katsumasa, Nishio, Masamichi, Murakami, Masao, Mori, Yoshimasa, Ogawa, Kazuhiko, and Committee, Japanese Society for Radiation Oncology Database

Subjects
RADIOTHERAPY, ONCOLOGISTS
Abstract

We evaluated the evolving structure of radiation oncology in Japan in terms of equipment, personnel, patient load and geographic distribution to identify and overcome any existing limitations. From March 2012 to August 2015, the Japanese Society for Radiation Oncology conducted a questionnaire based on the Japanese national structure survey of radiation oncology in 2011. Data were analyzed based on the institutional stratification by the annual number of new patients treated with radiotherapy per institution. The estimated annual numbers of new and total (new plus repeat) patients treated with radiation were 211 000 and 250 000, respectively. Additionally, the estimated cancer incidence was 851 537 cases with approximately 24.8% of all newly diagnosed patients being treated with radiation. The types and numbers of treatment devices actually used included linear accelerator (LINAC; n  = 836), telecobalt (n  = 3), Gamma Knife (n  = 46), 60Co remote afterloading system (RALS; n  = 24), and 192Ir RALS (n  = 125). The LINAC system used dual-energy functions in 619 units, 3D conformal radiotherapy functions in 719 and intensity-modulated radiotherapy (IMRT) functions in 412. There were 756 JRS or JASTRO-certified radiation oncologists, 1018.5 full-time equivalent (FTE) radiation oncologists, 2026.7 FTE radiotherapy technologists, 149.1 FTE medical physicists, 141.5 FTE radiotherapy quality managers and 716.3 FTE nurses. The frequency of IMRT use significantly increased during this time. To conclude, although there was a shortage of personnel in 2011, the Japanese structure of radiation oncology has clearly improved in terms of equipment and utility. [ABSTRACT FROM AUTHOR]

Published
2019
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