The Geriatric Nutritional Risk Index: A Key Indicator of Perioperative Outcome in Oldest-old Patients With Colorectal Cancer.

Background/aim: Colorectal cancer (CRC) presents a significant challenge in oldest-old patients (≥85 years), where surgical intervention carries substantial perioperative risks. Nutritional status is a crucial determinant of outcomes, and the Geriatric Nutritional Risk Index (GNRI) has shown promise. This prospective study aimed to validate the GNRI as a key indicator of perioperative outcomes in oldest-old patients undergoing CRC surgery, and to establish its utility in preoperative risk stratification.

Early C-reactive protein as a predictive biomarker for postoperative complications following robot-assisted surgery for rectal cancer.

This retrospective cohort study aimed to assess the predictive value of early postoperative C-reactive protein (CRP) levels for complications following robot-assisted rectal surgery (RARS) for rectal cancer. We analyzed data from 117 consecutive patients who underwent elective RARS at Okayama University Hospital between September 2020 and January 2025. Serum CRP levels were routinely measured preoperatively and on postoperative days (POD) 1 and 4.

A case of retrograde colonic intussusception by tubulovillous adenoma.

Introduction: Retrograde colonic intussusception is a rare condition in adults, often caused by organic lesions such as tumors. Autonomic dysfunction in disorders like multiple system atrophy (MSA) might contribute to its occurrence.

Case Presentation: An 81-year-old bedridden woman with a history of MSA presented with severe abdominal pain and abdominal distension lasting 4 days.

Precise stratification of prognosis in pancreatic ductal adenocarcinoma patients based on pre- and postoperative genomic information.

Background: Pancreatic ductal adenocarcinoma (PDAC) has the highest mortality rate among all cancers; hence, multidisciplinary treatment is essential for patients with PDAC. Although the resectability status, tumour marker, KRAS circulating tumour DNA (mutKRAS-ctDNA) mutations, and GATA binding 6 (GATA6) expression status are promising prognostic biomarkers, their effective integration before and after surgery remains unclear.

Methods: In this retrospective cohort study, patients with PDAC who had undergone radical resection were enrolled, and pre- and postoperative independent factors associated with poor prognosis were identified using Cox hazard modelling.

Mesenteric Route Superior Mesenteric Artery First Approach in Robot-Assisted Pancreatoduodenectomy.

Background: The superior mesenteric artery (SMA) approach is crucial for the successful implementation of robot-assisted pancreatoduodenectomy (RPD). Herein, we present a novel technique, the mesenteric route SMA-first approach, for RPD.

Patients And Methods: A 20-year-old woman with a 50 mm intraductal papillary mucinous neoplasm underwent RPD.

Robotic posterior radical antegrade modular pancreatosplenectomy for left-sided pancreatic cancer using the ligament of Treitz first approach: A case report and technical note.

Introduction: Radical antegrade modular pancreatosplenectomy (RAMPS) is the standardized open surgical technique for treating left-sided pancreatic cancer. However, studies reporting the surgical approaches for robotic RAMPS are limited. Here, we present a robotic posterior RAMPS using the ligament of Treitz first approach.

ADAR1 as a prognostic marker for patients with colorectal cancer and synchronous liver metastasis and a predictor of chemotherapy efficacy.

RNA editing by adenosine deaminase acting on RNA (ADAR) enzymes plays a role in cancer progression. However, its clinical significance in metastatic colorectal cancer (CRC) remains unclear. This study aimed to evaluate whether ADAR1 expression predicts prognosis and treatment response in colorectal cancer (CRC) with synchronous liver metastasis.

Oncolytic virus-mediated p53 activation boosts the antitumor immunity of a p53-transduced dendritic cell vaccine.

Dendritic cells (DCs) transduced with replication-deficient, wild-type human p53-expressing adenovirus Ad-p53 (Ad-p53 DCs) induce p53-targeting cytotoxic T lymphocytes (CTLs). However, the antitumor efficacy of Ad-p53 DCs is diminished by weak p53 immunogenicity in tumor cells and poor immune responses. We developed a p53-armed oncolytic adenovirus, OBP-702, to induce tumor-specific p53 expression and antitumor immune response, suggesting a role for OBP-702 in enhancing the antitumor efficacy of Ad-p53 DCs.

Impact of internal stent placement on late biliary complications after robot-assisted pancreaticoduodenectomy.

Background: Late biliary complications, consisting of anastomotic stricture and cholangitis, are known to impair long-term quality of life and significantly impact patient outcomes following robot-assisted pancreaticoduodenectomy (RPD). The role of stent placement in HJ remains debatable. This study aimed to investigate the incidence of late biliary complications and the impact of stent placement on long-term outcomes after RPD.

A Case of Omental Bleeding as a Result of Segmental Arterial Mediolysis Treated Successfully by Laparoscopic Partial Omentectomy.

Introduction: Segmental arterial mediolysis (SAM) is a rare, non-atherosclerotic, non-inflammatory arteriopathy characterized by lysis of the arterial media, leading to aneurysm formation and possible rupture. Although visceral arteries are typically involved, SAM-induced omental bleeding is extremely uncommon. While transcatheter arterial embolization (TAE) has been reported, surgical resection offers both definitive hemostasis and histopathological confirmation.

Severe Anemia Caused by a Colorectal Lipoma With Central Erosions: A Case Report.

Colorectal lipomas are benign tumors that are often asymptomatic and discovered incidentally. In most cases, they can be managed conservatively with observation. We report the case of a man in his 70s with a colorectal lipoma located in the cecum.

[Development of Oncolytic Viruses against Cancer].

Oncolytic virotherapy is a novel antitumor therapy using genetically modified oncolytic viruses(OVs)that specifically replicate and induce lytic cell death in tumor cells. OVs directly induce tumor cell death and indirectly enhance the antitumor efficacy of chemoradiotherapy by suppressing cell survival signaling. Moreover, OVs activate antitumor immunity by inducing immunogenic cell death and enhance the antitumor effect of immune checkpoint inhibitors.

Grafting Islets to a Prevascularized Subcutaneous Site to Improve Transplant Survival and Function: A Mouse Model.

Background: The subcutaneous space is regarded as a potential site for islet transplantation; however, hypoxic conditions are a major drawback. We hypothesized that islet transplantation into a prevascularized subcutaneous space created using in-body tissue architecture technology would improve islet engraftment and contribute to maintaining the function of transplanted islets.

Methods: Five hundred syngeneic islets were transplanted into the prevascularized subcutaneous space (PSS) constructed by the implantation of a silicone rod for 2 weeks in C57BL/6J diabetic mice.

Robotic pancreatoduodenectomy for a giant duodenal leiomyoma: A case report and literature review.

Introduction: Duodenal leiomyomas are rare mesenchymal tumors. To date, several studies have reported on the safety and feasibility of surgical intervention for duodenal leiomyomas. However, minimally invasive surgery has rarely been performed in cases with duodenal leiomyomas.

Obese Patient with Gastric Diverticulum Undergoing Laparoscopic Sleeve Gastrectomy Guided by Preoperative Endoscopic Measurement: A Case Report and Literature Review.

Introduction: Gastric diverticulum is a rare condition, often asymptomatic and incidentally detected. Laparoscopic sleeve gastrectomy (LSG) is a widely performed bariatric procedure, but a gastric diverticulum complicates surgical planning. In this case, careful preoperative assessment allowed safe execution of LSG despite the diverticulum's proximity to the esophagogastric junction.

Robotic distal pancreatectomy using two-surgeon technique (TAKUMI-4): a technical note and initial outcomes.

Purpose: With the increasing use of minimally invasive distal pancreatectomy, the use of robotic distal pancreatectomy (RDP) is also increasing worldwide. Standardized surgical protocols are essential for safe implementation of RDP. In this study, we present our surgical protocol and initial outcomes of RDP using “two-surgeon technique”.

[Development of Oncolytic Virus Immunotherapy to Improve the Immunosuppressive Microenvironment in Pancreatic Cancer].

Immunotherapy resistance in pancreatic ductal adenocarcinoma(PDAC)limits treatment outcomes; therefore, improving the immunosuppressive microenvironment is important for PDAC treatment. We developed an oncolytic adenovirus, OBP-702, carrying the tumor suppressor gene p53, and report its therapeutic potential to induce cytopathic effects and activate antitumor immunity via p53 induction. In the present study, we investigated the therapeutic potential of epigenetic modulators in oncolytic viral immunotherapy combined with a dendritic cell vaccine.

Total Pancreatectomy with "Superior Mesenteric Artery-First Approach".

Introduction: Total pancreatectomy (TP) is a technically demanding procedure for patients with multifocal pancreatic diseases. Although the benefits of the superior mesenteric artery (SMA)-first approach for pancreatic cancer (PC) have been reported in pancreatic surgery, few studies have demonstrated surgical techniques of SMA-first approach in TP.

Methods: This report presents our novel SMA-first approach for PC in TP, including six steps.

Osteosarcoma cell-derived CCL2 facilitates lung metastasis via accumulation of tumor-associated macrophages.

Osteosarcoma (OS) is the most common malignant tumor of bone in children and adolescents. Although lung metastasis is a major obstacle to improving the prognosis of OS patients, the underlying mechanism of lung metastasis of OS is poorly understood. Tumor-associated macrophages (TAMs) with M2-like characteristics are reportedly associated with lung metastasis and poor prognosis in OS patients.

Safe Resection of Esophageal Cancer with a Non-Recurrent Inferior Laryngeal Nerve Associated with an Aberrant Right Subclavian Artery Using Intraoperative Nerve Monitoring.

In thoracic esophageal cancer, lymph node dissection around the recurrent laryngeal nerve is crucial but poses a risk of nerve palsy, affecting postoperative quality of life. In cases with an aberrant right subclavian artery (ARSA), the right recurrent laryngeal nerve is absent, and the non-recurrent inferior laryngeal nerve (NRILN) enters the larynx directly from the vagus nerve in the cervical region. Identifying the course of the NRILN is vital to avoid injury.

A Procedural Transhiatal Approach for the Thoracic Para-Aortic Lymph Node: A Case Report.

The thoracic posterior para-aortic lymph node (TPAN) is classified as an extra-regional lymph node in esophageal cancer, with metastasis indicating poor prognosis. However, some cases with suspected TPAN metastasis may benefit from esophagectomy with lymph node dissection, including TPAN. This report presents the case of a 58-year-old man with upper thoracic esophageal squamous cell carcinoma and suspected simultaneous TPAN metastasis who underwent neoadjuvant chemotherapy followed by thoracoscopic subtotal esophagectomy and procedural transhiatal TPAN dissection.

Metachronous Pancreatic Metastasis of Myxoid Liposarcoma Successfully Treated With Robotic Spleen-Preserving Distal Pancreatectomy With Splenic Vessels Resections: A Case Report.

Pancreatic metastasis of myxoid liposarcoma (MLS) after primary resection is extremely rare. Herein, we present a case of metachronous pancreatic metastasis of MLS that was successfully treated with robotic spleen-preserving distal pancreatectomy (SPDP) using the Warshaw technique. A 60-year-old woman underwent radical resection of a 25-cm MLS in the right thigh after receiving neoadjuvant radiotherapy.

ADAR1-high tumor-associated macrophages induce drug resistance and are therapeutic targets in colorectal cancer.

Background: Colorectal cancer (CRC) is considered the third most common type of cancer worldwide. Tumor-associated macrophages (TAMs) have been shown to promote drug resistance. Adenosine-to-inosine RNA-editing, as regulated by adenosine deaminase acting on RNA (ADAR), is a process that induces the posttranscriptional modification of critical oncogenes.