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RISS 인기검색어
- 검색키워드
- 저자 : Yusuke Miyamoto (검색결과 5 건)
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Transient osteoporosis of the hip with a femoral neck fracture during follow-up: a case report
( Yusuke Tabata ),( Shuhei Matsui ),( Masabumi Miyamoto ),( Koichiro Omori ),( Yoichiro Tabata ),( Tokifumi Majima ) 영남대학교 의과대학 2023 Yeungnam University Journal of Medicine Vol.40 No.2
We report a case of transient osteoporosis of the hip with a femoral neck fracture found during follow-up. A 53-year-old man pre sented with left hip pain without trauma. The pain did not improve after 2 weeks and he was brought to our hospital by ambulance. Magnetic resonance imaging (MRI) of the left hip joint showed diffuse edema in the bone marrow, which was identified by low signal intensity on T1-weighted images, high signal intensity on T2-weighted images, and increased signal intensity on short tau inversion recovery. This edema extended from the femoral head and neck to the intertrochanteric area. He was diagnosed with transient osteo porosis of the left hip. Rest gradually improved his pain; however, 3 weeks later, his left hip pain worsened without trauma. X-ray, computed tomography, and MRI results of the hip joint demonstrated a left femoral neck fracture, and osteosynthesis was performed. Differential diagnoses included avascular necrosis of the femoral head, infection, complex regional pain syndrome, rheumatoid arthri tis, leukemia, and other cancers. Transient osteoporosis of the hip generally has a good prognosis with spontaneous remission within a few months to 1 year. However, a sufficient length of follow-up from condition onset to full recovery is necessary to avoid all probable complications such as fractures.
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Fujimori, Taro,Miyamoto, Yusuke,Hayashi, Yasuhiro The Korean Institute of Electrical Engineers 2012 The Journal of International Council on Electrical Vol.2 No.4
Photovoltaic (PV) systems have rapidly proliferated in Japan. One resulting problem is that PV output not consumed by residences is fed to distribution lines, significantly increasing voltage in the distribution system. Power conditioning systems must therefore suppress PV output to maintain appropriate voltage levels. This paper proposes a control method for diverting reverse power flow into storage batteries, avoiding the need for suppression. Another problem is that batteries are expensive, making it necessary to reduce total battery capacity. This paper therefore identifies residences where storage batteries should be introduced by calculating a suitability evaluation coefficient. This allows allocation of a priority sequence for introducing batteries into highly ranked residences. The authors furthermore begin investigation of battery control methods for effective suppression of battery output.
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The sphenopalatine vein: anatomical study of a rarely described structure
Joe Iwanaga,Eric Pineda,Yusuke Miyamoto,Grzegorz Wysiadecki,Samir Anadkat,R. Shane Tubbs 대한해부학회 2023 Anatomy & Cell Biology Vol.56 No.2
Although in counterpart, the sphenopalatine artery (SPA), has been well described in the medical literature, thesphenopalatine vein (SPV) has received scant attention. Therefore, the present anatomical study was performed. Additionally, we discuss the variations, embryology, and clinical significance of the SPV. Adult cadaveric specimens underwent dissection of the SPV. In addition, some specimens were submitted for histological analysis of this structure. The SPV was found to drain from the sphenoidal sinus and nasal septum. Small tributaries traveled through the nasal septum with the posterior septal branches of the SPA and nasopalatine nerve. The SPA and SPV were found to travel through the sphenopalatine foramen and another tributary was found to perforate the medial plate of the pterygoid process and to connect to the pterygoid venous plexus which traveled lateral to the medial plate of the pterygoid process. The vein traveled through the posterior part of the lateral wall of the nasal cavity with the posterior lateral nasal branches of the SPA and the lateral superior posterior nasal branches of the maxillary nerve. To our knowledge, this is the first anatomical study on the SPV in humans. Data on the SPV provides an improved anatomical understanding of the vascular network of the nasal cavity. Developing a more complete picture of the nasal cavity and its venous supply might help surgeons and clinicians better manage clinical entities such as posterior epistaxis, cavernous sinus infections, and perform endoscopic surgery with fewer complications.
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Cervical Symmetric Dumbbell Ganglioneuromas Causing Severe Paresis
Akira Hioki,Kei Miyamoto,Yoshinobu Hirose,Yusuke Kito,Kazunari Fushimi,Katsuji Shimizu 대한척추외과학회 2014 Asian Spine Journal Vol.8 No.1
We report an extremely rare case with bilateral and symmetric dumbbell ganglioneuromas of the cervical spine in an elderly patient. A 72-year-old man came by ambulance to our hospital due to progressive incomplete paraplegia. Magnetic resonance imaging demonstrated bilateral symmetric dumbbell tumors at the C1/2 level. We performed total resection of the intracanalar tumor, aiming at complete decompression of the spinal cord, and partial and subtotal resection of foraminal outside portions. Histopathological examination of the surgical specimen indicated the tumor cells to be spindle cells with the presence of ganglion cells and no cellular pleomorphism, suggesting a diagnosis of ganglioneuroma. Although the surgery was not curative, the postoperative course was uneventful and provided a satisfactory outcome. This is the fourth known case of cervical ganglioneuromas of the bilateral symmetric dumbbell type.
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Yuji Ikeda,Sho Sato,Akira Yabuno,Daisuke Shintani,Aiko Ogasawara,Maiko Miwa,Makda Zewde,Takashi Miyamoto,Keiichi Fujiwara,Yusuke Nakamura,Kosei Hasegawa 대한부인종양학회 2020 Journal of Gynecologic Oncology Vol.31 No.6
Objective: Maternal embryonic leucine zipper kinase (MELK) is receiving an attentionas a therapeutic target in various types of cancers. In this study, we aimed to evaluate theprognostic significance of MELK expression in ovarian cancer using clinical samples, andassessed the efficacy of a small molecule MELK inhibitor, OTS167, using patient-derivedovarian cancer cells as well as cell lines. Methods: Expression levels of MELK in 11 ovarian cancer cell lines were confirmed bywestern blotting. Inhibitory concentration of OTS167 was determined by colorimetric assay. MELK messenger RNA (mRNA) expression was evaluated in 228 ovarian cancer patients byquantitative polymerase chain reaction. Growth inhibition of OTS167 was also evaluatedusing freshly-isolated primary ovarian cancer cells including spheroid formation condition. Results: MELK mRNA expression was significantly higher in ovarian cancer than in normalovaries (p<0.001), and high MELK mRNA expression was observed in patients with advancedstage, positive ascites cytology and residual tumor size. Patients with high MELK mRNAexpression showed shorter progression-free survival (p=0.001). Expression of MELK wasalso confirmed in 10 of 11 ovarian cancer cell lines tested, and the half maximal inhibitoryconcentration of MELK inhibitor, OTS167, ranged from 9.3 to 60 nM. Additionally, OTS167showed significant growth inhibitory effect against patient-derived ovarian cancer cells,regardless of their tumor locations, histologic subtypes and stages. Conclusions: We demonstrated MELK as both a prognostic marker and a therapeutic targetfor ovarian cancer using clinical ovarian cancer samples. MELK inhibition by OTS167 may bean effective approach to treat ovarian cancer patients.
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