YAMAMOTO Ryohei

写真a

Affiliation

Hospital  Urology 

To the head of this page.▲

Research Interests 【 display / non-display 】

  • 悪性腫瘍

  • 腎移植

To the head of this page.▲

Graduating School 【 display / non-display 】

  • 　
    -
    2010.03

    Akita University   Faculty of Medicine   Graduated

To the head of this page.▲

Graduate School 【 display / non-display 】

  • 2014.04
    -
    2021.03

    Akita University  Graduate School, Division of Medicine  Doctor's Course  Completed

To the head of this page.▲

Campus Career 【 display / non-display 】

  • 2021.04
    -
    Now

    Akita University   Hospital   Urology   Assistant Professor  

To the head of this page.▲

Academic Society Affiliations 【 display / non-display 】

  • 2012.04
    -
    Now
     

    Japan

     

    The Japanese Urological Association

To the head of this page.▲

Research Areas 【 display / non-display 】

  • Life Science / Urology

  • Life Science / General surgery and pediatric surgery

To the head of this page.▲
 

Thesis for a degree 【 display / non-display 】

  • Treg expansion with trichostatin A ameliorates kidney ischemia/reperfusion injury in mice by suppressing the expression of costimulatory molecules

    Ryohei Yamamoto, Mitsuru Saito, Kazuyuki Numakura, Shintaro Narita, Takamitsu Inoue, Shigeru Satoh, Tomonori Habuchi  

    Transplant immunology    2021.03

    Single author

To the head of this page.▲

Research Achievements 【 display / non-display 】

    ◆Original paper【 display / non-display 】

  • Complications of robot-assisted nephroureterectomy and their management

    Japanese Journal of Endourology and Robotics ( Japanese Society of Endourology and Robotics )  38 ( 2 ) 189 - 192   2025

    Research paper (journal)  

    <p>  April 2022, robot-assisted nephroureterectomy (RANU) was approved for insurance coverage in Japan. Consequently, the number of facilities performing the procedure is gradually increasing. We compared the perioperative outcomes between patients with upper tract urothelial carcinoma treated with RANU (the RANU group, 19 cases) and conventional laparoscopic surgery (the CLS group, 21 cases) at the Department of Urology, Akita University Hospital. In the CLS group, estimated blood loss was significantly higher, with two cases requiring blood transfusion. Although the frequency of lymph node dissection was similar between the groups, the mean number of lymph nodes removed was higher in the RANU group. Further, although there was no significant difference in the overall incidence of perioperative complications based on the Clavien-Dindo classification grading system, chylous ascites was more frequent in the RANU group. Considering the possibility of incomplete lymphatic vessel sealing during lymph node dissection in RANU, we believe that frequent clipping and the proactive use of sealing devices are essential to ensure effective lymphatic control and reduce complication like chylous ascites.</p>

    DOI CiNii Research

  • Four Cases of Bladder Cancer in Young Patients with Severe Motor and Intellectual Disabilities

    NARA Taketoshi, NUMAKURA Kazuyuki, KIKUCHI Akane, SEKINE Yuya, MUTO Yumina, KOBAYASHI Mizuki, KASHIMA Soki, YAMAMOTO Ryohei, SAITO Mitsuru, NARITA Shintaro, HABUCHI Tomonori

      70 ( 8 ) 227 - 231   2024.08

    Research paper (journal)  

    DOI CiNii Research

  • Specific Gut Microbial Environment in Lard Diet-Induced Prostate Cancer Development and Progression

    Sato H.

    International Journal of Molecular Sciences ( International Journal of Molecular Sciences )  23 ( 4 )   2022.02

    Research paper (journal)  

    DOI

  • Successful Re-Administration of Nivolumab in Patient with Metastatic Renal Cell Carcinoma : A Case Report

    Sasagawa H.

    Hinyokika kiyo. Acta urologica Japonica ( Hinyokika kiyo. Acta urologica Japonica )  67 ( 12 ) 525 - 528   2021.12

    Research paper (journal)  

    A 46-year-old woman was referred to our hospital with a left-sided renal tumor pointed out by ultrasonography at the time of a medical checkup．Computed tomography revealed a mass measuring 88×77×68 mm on the upper pole of the left kidney. She was diagnosed with cT2aN0M0 clear cell renal cell carcinoma. Laparoscopic left nephrectomy was performed uneventfully. Histopathological diagnosis was clear cell renal cell carcinoma, G2, v1, pT2. Four months after surgery, lung metastases appeared, and systemic therapy was given sequentially as follows ; sunitinib for 2 months, nivolumab for 8 months, axitinib for 17 months, and pazopanib for 2 months．However, metastases progressed, and a re-administration of nivolumab was planned. The nivolumab re-treatment resulted in a marked reduction in multiple lung metastases despite the previous failure by nivolumab treatment. There are few reports on the therapeutic effect of re-administration of nivolumab. We report a case of successful treatment by re-administration of nivolumab.

    DOI CiNii Research

  • ロボット支援腎部分切除術における腎実質縫合の有無による術後腎実質体積のCT volumetryを用いた比較検討

    提箸 隆一郎, 井上 高光, 中島 志織, 嘉島 相輝, 山本 竜平, 小泉 淳, 奈良 健平, 神田 壮平, 沼倉 一幸, 齋藤 満, 成田 伸太郎, 佐藤 滋, 羽渕 友則

    Japanese Journal of Endourology ( 日本泌尿器内視鏡学会 )  34 ( 1 ) 130 - 135   2021

    Research paper (journal)  

    <p>【目的】ロボット支援腎部分切除術 (RAPN) における腎実質縫合の追加が術後の腎実質体積を減少させるかを画像解析ソフトにより検討した. また腎機能, 合併症への影響も検討した.</p><p>【対象と方法】2013年11月から2018年11月までに当科でRAPNを行ったT1a症例69例のうち, 腎実質縫合を施行した26例 (実質縫合群) と省略した43例 (非縫合群) を後方視的に比較した. Synapse Vincent ver. 4を用いて, 術前と術後6カ月の造影CTから腎実質減少体積を推定した.</p><p>【結果】2群間の患者背景や手術成績に有意差はなかった. 腎実質体積の減少量やeGFRの低下率, 合併症の発生率に有意差を認めなかった.</p><p>【結語】RAPNにおける腎実質縫合の追加は腎実質体積や腎機能, 合併症の発生に影響しなかった.</p>

    DOI CiNii Research

    • display all >>

    To the head of this page.▲

    ◆Research society, Symposium materials, etc.【 display / non-display 】

  • Preoperative Obesity based on Body mass Index of Kidney Transplant Recipients: Its Impact for the Clinical Outcome

    Ryohei Yamamoto, Mitsuru Saito, Nobuhiro Fujiyama, Taketoshi Nara, Kazuyuki Numakura, Shintaro Narita, Tomonori Habuchi

    Akita Nephrology Dialysis Transplantation   25   125 - 131   2022.11  [Refereed]

    Research paper (research society, symposium materials, etc.)   Domestic Co-author

To the head of this page.▲

Grant-in-Aid for Scientific Research 【 display / non-display 】

  • Grant-in-Aid for Early-Career Scientists

    Project Year： 2021.04  -  2024.03 

  • Grant-in-Aid for Young Scientists(B)

    Project Year： 2021.04  -  2023.03 

  • Protective Effects of Regulatory T cells in Renal Ischemia-Reperfusion Injury in a Murine Model

    Grant-in-Aid for Young Scientists(B)

    Project Year： 2017.04  -  2019.03  Investigator(s): YAMAMOTO RYOHEI

To the head of this page.▲

Presentations 【 display / non-display 】

  • A Case of Renal Anastomosing Hemangioma

    SASAKI Yoshiki, KASHIMA Soki, KOYAMA Takashi, HIROSHIMA Yuko, AMANO Kenji, TAKAHASHI Syuhei, NARA Taketoshi, KOIZUMI Atsushi, YAMAMOTO Ryohei, NUMAKURA Kazuyuki, SAITO Mitsuru, NARITA Shintaro, NANJO Hiroshi, SATOH Shigeru, HABUCHI Tomonori

    2022.08  -  2022.08 

    DOI

  • Preoperative rebound of anti-ABO blood type antibody is a risk f actor of acute antibody-mediated rejection in kidney transplant recipients even in rituximab era

    Ryohei Yamamoto, et al

    American Urological Association2021  2021.09  -  2021.09 

  • マウス腎虚血／再灌流障害モデルにおける制御性T細胞の腎保護効果の検討

    山本　竜平，他

    第86回日本泌尿器科学会東部総会  (旭川)  2021.09  -  2021.09 

To the head of this page.▲