Masashi Mizumoto
University of Tsukuba
CancerInternal medicineRadiologySurgeryOncologyRetrospective cohort studyBeam (structure)Adverse effectSurvival rateChemotherapyCarcinomaHepatocellular carcinomaProton therapyEsophageal cancerNuclear medicineLiver functionRadiation therapyProtonMedicineGastroenterology
150Publications
28H-index
2,185Citations
Publications 148
Newest
Abstract null Objectives null To estimate appropriate dose-volume parameters for avoidance of pneumonitis in use of chemoradiotherapy and durvalumab for treatment of lung cancer. null Materials and methods null Patients with non-small cell lung cancer treated with concurrent chemoradiotherapy followed by durvalumab at 9 centers were enrolled in the study. Three-dimensional radiotherapy, intensity modulated radiotherapy, and proton beam therapy were used. The frequency and severity of pneumonitis...
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#1Hiroshige Sato (University of Tsukuba)H-Index: 2
#2Masashi Mizumoto (University of Tsukuba)H-Index: 28
Last. Koji TsuboiH-Index: 33
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This study aimed to evaluate the long-term efficacy of proton beam therapy (PBT) for unresectable benign meningiomas at the University of Tsukuba, Japan. From 1986-1998, 10 patients were treated at the Particle Radiation Medical Science Center (PRMSC) with a relative biological effectiveness (RBE) value of 1.0 using an accelerator built for physics experiments. The total dose was compensated with an X-ray in three patients. Following that, from 2002-2017, 17 patients were treated with a RBE valu...
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#1Masashi MizumotoH-Index: 28
#2Yoshiko OshiroH-Index: 20
Last. Hideyuki SakuraiH-Index: 32
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Background This study was conducted to evaluate late toxicities in adolescent and young adult (AYA) patients who received photon or proton therapy. Methodology A total of 106 AYA patients who received proton and photon therapy and were followed-up for more than two years were retrospectively evaluated. The median age of patients was 22 years (range, 15-29 years). A total of 47 patients were male and 59 were female. A total of 35 and 71 patients received photon and proton therapy, respectively. A...
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#1Masashi MizumotoH-Index: 28
#2Hiroshi FujiH-Index: 14
Last. Hideyuki SakuraiH-Index: 32
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Abstract Children and adolescents and young adults (AYAs) with cancer are often treated with a multidisciplinary approach. This includes use of radiotherapy, which is important for local control, but may also cause adverse events in the long term, including second cancer. The risks for limited growth and development, endocrine dysfunction, reduced fertility and second cancer in children and AYAs are reduced by proton beam therapy (PBT), which has a dose distribution that decreases irradiation of...
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#1Ryoko Suzuki (University of Tsukuba)H-Index: 6
#2Hiroko Fukushima (University of Tsukuba)H-Index: 10
Last. Hidetoshi Takada (University of Tsukuba)H-Index: 36
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BACKGROUND: The optimal treatment for rhabdomyosarcoma (RMS) requires multidisciplinary treatment with chemotherapy, surgery, and radiotherapy. Surgery and radiotherapy are integral to the local control (LC) of RMS. However, postsurgical and radiotherapy-related complications could develop according to the local therapy and tumor location. In this study, we conducted a single-center analysis of the outcomes and toxicity of multidisciplinary treatment using proton beam therapy (PBT) for pediatric...
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#1Takuya Sawada (University of Tsukuba)
#2Masashi Mizumoto (University of Tsukuba)H-Index: 28
Last. Hideyuki Sakurai (University of Tsukuba)H-Index: 32
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Abstract Desmoid tumors are benign, but may have a locally invasive tendency that commonly results in local recurrence. Most occur on the body trunk or extremities, whereas a head and neck desmoid tumor is relatively rare. The efficacy of radiotherapy has been suggested and 50-60 Gy is used for unresectable or recurrent desmoid tumors, but there are few reports of use of particle beam therapy. However, since this tumor occurs more often in younger patients compared to malignant tumors and the pr...
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Abstract Background Hepatic hemangiomas are benign tumors with a favorable prognosis, but giant hepatic hemangiomas can cause abdominal symptoms and are indicated for treatment. Most cases are treated with surgery, but radiotherapy has also been used. However, to date, there have been no reports of proton beam therapy for a hepatic hemangioma. Case presentation A 46-year-old woman had a tumor of 80 × 80 mm in the left medial lobe of the liver, which was diagnosed as a giant hemangioma based on t...
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#1Keiichiro Baba (University of Tsukuba)H-Index: 1
#2Masashi Mizumoto (University of Tsukuba)H-Index: 28
Last. Hideyuki Sakurai (University of Tsukuba)H-Index: 32
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Impairment of bone growth after radiotherapy for pediatric bone cancer is a well-known adverse event. However, there is limited understanding of the relationship between bone growth and irradiation dose. In this study, we retrospectively analyzed bone growth impairment after proton beam therapy for pediatric cancer. A total of 353 vertebral bodies in 23 patients under 12 years old who received proton beam therapy were evaluated. Compared to the non-irradiated vertebral body growth rate, the irra...
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#1Hidehiro Kohzuki (University of Tsukuba)H-Index: 4
#2Ai Muroi (University of Tsukuba)H-Index: 6
Last. Akira Matsumura (University of Tsukuba)H-Index: 37
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#1Takao Tsurubuchi (University of Tsukuba)H-Index: 10
#2Shingo Takano (University of Tsukuba)H-Index: 29
Last. Akira Matsumura (University of Tsukuba)H-Index: 37
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