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  1. Article

    Open Access

    Combined thoracoscopic and laparoscopic surgery for epiphrenic diverticulum with associated gastroesophageal reflux disease: a case report

    Surgery is indicated for symptomatic epiphrenic esophageal diverticula. Based on the features of a case, thoracoscopic or laparoscopic approaches may be used. Epiphrenic diverticula are often associated with e...

    Yusuke Uchi, Soji Ozawa, Tomofumi Ando, Koki Hayashi, Takuma Aoki in Surgical Case Reports (2024)

  2. No Access

    Article

    Effectiveness of computed tomography scoring for the early diagnosis of anastomotic leakage after esophagectomy

    Anastomotic leakage after esophagectomy is associated with increased mortality; therefore, early diagnosis is highly important. This study aimed to identify the characteristic computed tomography (CT) findings...

    Kentaro Yatabe, Kazuo Koyanagi, Tadashi Higuchi in Langenbeck's Archives of Surgery (2023)

  3. Article

    Open Access

    Laparoscopic Heller myotomy and Dor fundoplication following an unsuccessful peroral endoscopic myotomy

    Achalasia is an esophageal motility disorder that presents as dysphagia and severely affects quality of life. An esophageal myotomy has been the golden standard for treatment. Peroral endoscopic myotomy (POEM)...

    Takuma Aoki, Soji Ozawa, Koki Hayashi, Tomofumi Ando, Yusuke Uchi in Surgical Case Reports (2023)

  4. No Access

    Article

    Usefulness of skeletal muscle measurement by computed tomography in patients with esophageal cancer: changes in skeletal muscle mass due to neoadjuvant therapy and the effect on the prognosis

    This analysis was performed to clarify the usefulness of skeletal muscle measurements using computed tomography (CT) in patients with esophageal cancer and the effect of treatment-induced changes in the skelet...

    Miho Yamamoto, Soji Ozawa, Kazuo Koyanagi, Akihito Kazuno, Yamato Ninomiya in Surgery Today (2023)

  5. No Access

    Article

    Predictive impact of the thoracic inlet space on ICG fluorescence blood flow speed in the gastric conduit wall and anastomotic leakage after esophagectomy

    The thoracic inlet space might influence the blood vessel perfusion in the gastric conduit. The purpose of this study was to clarify the impacts of the thoracic inlet space on blood vessel perfusion in the gas...

    Yamato Ninomiya, Kazuo Koyanagi, Soji Ozawa, Junya Oguma, Akihito Kazuno in Esophagus (2023)

  6. Article

    Open Access

    Evidence-based clinical practice guidelines for gastroesophageal reflux disease 2021

    In Japan, with the increasing prevalence of gastroesophageal reflux disease (GERD) and growing public interest, the Japanese Society of Gastroenterology issued Evidence-based Clinical Practice Guidelines for G...

    Katsuhiko Iwakiri, Yasuhiro Fujiwara, Noriaki Manabe in Journal of Gastroenterology (2022)

  7. No Access

    Article

    Indocyanine green fluorescence imaging for evaluating blood flow in the reconstructed conduit after esophageal cancer surgery

    We investigated the effectiveness of indocyanine green (ICG) fluorescence blood flow imaging of the gastric conduit to evaluate anastomotic leakage after esophagectomy. We identified 19 articles using the PRIS...

    Kazuo Koyanagi, Soji Ozawa, Yamato Ninomiya, Kentaro Yatabe in Surgery Today (2022)

  8. Article

    Open Access

    Comprehensive registry of esophageal cancer in Japan, 2014

    The registration committee for esophageal cancer in the Japan Esophageal Society (JES) has collected the patients' characteristics, treatment, and outcomes annually.

    Masayuki Watanabe, Yasushi Toh, Ryu Ishihara, Koji Kono, Hisahiro Matsubara in Esophagus (2022)

  9. No Access

    Article

    Usefulness of prone-position computed tomography as preoperative simulation prior to thoracoscopic esophagectomy for thoracic esophageal cancer

    The study aimed to evaluate the usefulness of prone-position computed tomography (CT) for predicting relevant thoracic procedure outcomes in minimally invasive esophagectomy (MIE) for thoracic esophageal cancer.

    Tadashi Higuchi, Soji Ozawa, Kazuo Koyanagi, Yamato Ninomiya, Kentaro Yatabe in Esophagus (2021)

  10. No Access

    Article

    Clinical impacts of magnetic resonance thoracic ductography on preventing postoperative chylothorax after thoracoscopic esophagectomy for esophageal cancer

    The study aimed to determine whether magnetic resonance thoracic ductography (MRTD) is useful for preventing injury to the thoracic duct (TD) during thoracoscopic esophagectomy and for reducing the incidence o...

    Tadashi Higuchi, Soji Ozawa, Kazuo Koyanagi, Junya Oguma, Yamato Ninomiya in Esophagus (2021)

  11. Article

    Open Access

    Small bowel obstruction caused by a true ileo-ileal knot: a rare case successfully treated by prior ligation of mesenteric vessels

    Intestinal knot formation, in which two segments of the intestine become knotted together, can result in intestinal obstruction. An ileo-ileal knot refers to knot formation between two ileal segments and is a ...

    Kohei Kanamori, Kazuo Koyanagi, Hitoshi Hara, Kenji Nakamura in Surgical Case Reports (2021)

  12. Article

    Open Access

    Significance of pulmonary resection in patients with metachronous pulmonary metastasis from pancreatic ductal adenocarcinoma: a retrospective cohort study

    Pulmonary metastases from pancreatic ductal adenocarcinoma (PDAC) are relatively rare. Systemic chemotherapy is the first choice of treatment in patients with distant metastases, and the role of metastasectomy...

    Taro Mashiko, Akira Nakano, Yoshihito Masuoka, Seiichiro Yamamoto in BMC Surgery (2021)

  13. No Access

    Article

    Association between indocyanine green fluorescence blood flow speed in the gastric conduit wall and superior mesenteric artery calcification: predictive significance for anastomotic leakage after esophagectomy

    Near-infrared fluorescence using indocyanine green (ICG) has been applied as a real-time navigation tool to observe blood flow in gastric conduit wall after esophagectomy. Atherosclerosis might impair the bloo...

    Kazuo Koyanagi, Soji Ozawa, Yamato Ninomiya, Junya Oguma, Akihito Kazuno in Esophagus (2021)

  14. Article

    Open Access

    Three resected cases of esophageal carcinoma considered as being secondary solid tumors after bone marrow transplantation

    Bone marrow transplantation is now an established treatment for some hematopoietic disorders and hematopoietic malignancies, and secondary solid tumors that develop after bone marrow transplantation have begun...

    Yamato Ninomiya, Soji Ozawa, Kazuo Koyanagi, Miho Yamamoto in Surgical Case Reports (2021)

  15. Article

    Open Access

    Combined primary hepatic neuroendocrine carcinoma and hepatocellular carcinoma: case report and literature review

    Hepatocellular carcinoma (HCC) can grow in a mosaic pattern, often combined with various non-hepatocellular cells. However, HCC combined with a neuroendocrine carcinoma (NEC) component is rarely reported, and ...

    Akira Nakano, Kenichi Hirabayashi, Hiroshi Yamamuro in World Journal of Surgical Oncology (2021)

  16. Article

    Open Access

    Thoracic and cardiovascular surgeries in Japan during 2018

    Hideyuki Shimizu, Morihito Okada in General Thoracic and Cardiovascular Surgery (2021)

  17. Article

    Open Access

    Comprehensive registry of esophageal cancer in Japan, 2013

    Esophageal cancer is the eighth most common cause of cancer mortality in Japan. More than 11,000 people had died from esophageal cancer in 2018. The Japan Esophageal Society has collected the data on patients'...

    Masayuki Watanabe, Yuji Tachimori, Tsuneo Oyama, Yasushi Toh in Esophagus (2021)

  18. No Access

    Article

    Prognostic significance of vasohibin-1 and vasohibin-2 immunohistochemical expression in gastric cancer

    It was recently identified that the vasohibin family may regulate angiogenesis through suppression by the vasohibin-1 gene and promotion by the vasohibin-2 gene. We assessed vasohibin expression in gastric can...

    Hitoshi Hara, Soji Ozawa, Yamato Ninomiya, Miho Yamamoto, Mika Ogimi in Surgery Today (2020)

  19. Article

    Open Access

    Successful laparoscopic surgery combined with selective arterial embolization for bleeding due to jejunal angiodysplasia: a case report

    Angiodysplasia of the gastrointestinal tract is a rare vascular pathology that sometimes causes massive hemorrhage. Angiodysplasias are particularly difficult to find in the small intestine for anatomical reas...

    Hitoshi Hara, Soji Ozawa, Kazuhito Nabeshima, Jun Koizumi in BMC Surgery (2020)

  20. No Access

    Article

    Plasma vasohibin-1 and vasohibin-2 are useful biomarkers in patients with esophageal squamous cell carcinoma

    Vasohibins (VASH), which are angiogenesis regulators, consist of Vasohibin-1 (VASH1) and Vasohibin-2 (VASH2). VASH1 is an angiogenesis inhibitor, while VASH2 is a proangiogenic factor. Patients with esophageal...

    Miho Yamamoto, Soji Ozawa, Yamato Ninomiya, Kazuo Koyanagi, Junya Oguma in Esophagus (2020)

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