Takeshi Omori

Early tumor shrinkage during first-line immune checkpoint inhibitor–based chemotherapy is associated with progression-free survival in measurable unresectable gastric cancer

Yuki Ushimaru, Kazuyoshi Yamamoto, Takeshi Omori, Toshihiro Kudo et autres

Abstract Background Early tumor shrinkage (ETS) has been proposed as an early indicator of treatment efficacy in advanced gastric cancer. However, its prognostic relevance during first-line immune checkpoint inhibitor (ICI)-based chemotherapy remains insufficiently characterized. Methods This retrospective single-center study included 162 patients …

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Primary outcomes of a phase II trial of laparoscopic/robotic total gastrectomy with spleen-preserving splenic hilar dissection for locally advanced proximal gastric cancer involving the greater curvature (JCOG1809)

Takahiro Kinoshita, Masayuki Yokoyama, Junya Kitadani, Takeshi Omori et autres

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Long-term Outcomes of OGSG1108: A Supplemental Study of Oral Nutritional Supplementation During Adjuvant S-1 Chemotherapy

Yoshitomo Yanagimoto, Toshimasa Tsujinaka, Junji Kawada, Masaaki Motoori et autres

BACKGROUND/AIM: The OGSG1108 trial evaluated the effect of oral elemental nutritional supplementation (ONS) on one-year compliance with adjuvant S-1 chemotherapy after gastrectomy for pathological stage II/III gastric cancer. It remains unknown whether intervention with ONS affords survival benefits, along with enhanced compliance …

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Zolbetuximab-induced gastric mucosal injury and hypoalbuminemia: a mechanism-informed clinical analysis

Yoshitomo Yanagimoto, Kazuyoshi Yamamoto, Kei Yamamoto, Yasunori Masuike et autres

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Multimodal Prehabilitation for Elderly GastricCancer : A Randomized Trial

Kazuyoshi Yamamoto, Takeshi Omori, Naoki Shinno, Yasunori Masuike et autres

Background:

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Nivolumab plus chemotherapy in Asian people with advanced or recurrent stomach or gastroesophageal junction cancer (ATTRACTION-4 study): a plain language summary

Li-Tzong Chen, Yoon-Koo Kang, Min-Hee Ryu, Do-Youn Oh et autres

Plain Language SummaryWhat is this summary about?This is a plain language summary of a study called ATTRACTION-4. In this study, researchers looked at the effects of a medication called nivolumab, which can boost anti-tumor immunity. Asian people with cancer of the stomach …

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Preoperative Gemcitabine/Nab‐Paclitaxel With Concurrent Radiation Therapy for Borderline Resectable Pancreatic Cancer: A Comparative Analysis With Preoperative Chemoradiation Therapy Using Gemcitabine Alone

Hirofumi Akita, Hidenori Takahashi, Yousuke Mukai, Masahiko Kubo et autres

ABSTRACT Background Although NCCN guidelines recommend preoperative therapy for borderline resectable pancreatic cancer (BR‐PC), it is still unclear which regimen is better. The study objective was to elucidate the prognostic significance of neoadjuvant chemoradiotherapy (NACRT) with gemcitabine/nab‐paclitaxel (GnP‐RT) compared to gemcitabine alone …

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An Exploratory Randomized Controlled Trial Comparing Ultrasonic Dissection and Monopolar Electrocautery in Single-Incision Laparoscopic Totally Extraperitoneal Inguinal Hernia Repair

Yujiro Nakahara, Kazuya Iwamoto, Shohei Takaichi, Masakatsu Paku et autres

Purpose: This exploratory study aimed to compare the surgical outcomes of ultrasonic dissection and monopolar electrocautery in single-incision laparoscopic totally extraperitoneal repair (SILS-TEP) for inguinal hernia. Methods: A single-center exploratory randomized controlled trial was conducted between July 2022 and December 2023, enrolling …

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Laparoscopic Abdominoperineal Resection for Ischemic Colitis after Laparoscopic Partial Resection of the Descending Colon: Case Report

Mitsuki Yokota, Hidekazu Takahashi, Asako Mike, Kei Fukumori et autres

INTRODUCTION: With advances in laparoscopic surgery, more sophisticated vessel-preserving techniques have become standardized. Laparoscopic partial colectomy aimed at maximizing colonic preservation is now widely performed. Along with this trend, cases of ischemic colitis developing after colorectal cancer surgery have occasionally been reported; …

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Single-Incision Laparoscopic Cholecystectomy in a Patient with a Left Ventricular Assist Device

Ayako Ishii, Shohei Takaichi, Kei Fukumori, Watsapol Juavi Jitjan et autres

INTRODUCTION: Laparoscopic cholecystectomy (LC) is the standard treatment for benign gallbladder diseases, including acute cholecystitis (AC). However, performing LC in patients with a left ventricular assist device (LVAD) presents specific technical and physiological challenges related to driveline preservation and hemodynamic stability. We …

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A Case of Robot-Assisted Ileocecal Resection for Ascending Colon Cancer with Ileocolic Vein Flowing into the Jejunal Vein: Case Report

Kyoko Kobayashi, Masakatsu Paku, Hidekazu Takahashi, Takashi Honda et autres

INTRODUCTION: Anatomical vascular variations are frequently observed in the right colon. The ileocolic vein (ICV) typically drains directly into the superior mesenteric vein (SMV). When vascular anomalies are present, surgical procedures often differ from standard techniques, which frequently increases the difficulty of …

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A single-center retrospective study of conversion surgery in stage IV gastric cancer: association with immune checkpoint inhibitor-based chemotherapy

Yuki Ushimaru, Takeshi Omori, Kazuyoshi Yamamoto, Kei Yamamoto et autres

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