Surgical Case Reports

Adenocarcinoma with Enteroblastic Differentiation and Neuroendocrine Features in Autoimmune Gastritis: Novel Insights into Tumor Development from Endocrine Cell Micronests

Hidetoshi Satomi, et al.

Autoimmune gastritis leads to fundic gland atrophy and compensatory endocrine cell hyperplasia.1) Enterochromaffin-like (ECL) cell proliferation induces the formation of endocrine cell micronests, with nodular aggregates ≥500 µm considered neoplastic.2) Here, we present a rare case of adenocarcinoma with enteroblastic differentiation (ACED) exhibiting neuroendocrine features in the context of autoimmune gastritis. Despite the poorly differentiated histology, which typically necessitates surgical resection, careful endoscopic assessment and precise technique achieved complete resection with negative margins.

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Salvage Right Ventricular Outflow Tract Reconstruction for Pulmonary Embolization with Pulmonary Artery Sarcoma

Tsubasa Nagai, et al.

INTRODUCTION: Pulmonary artery intimal sarcoma (PAIS) is extremely rare and highly malignant. Although improved outcomes have been reported after complete surgical resection and chemotherapy, limited information is available regarding the indications, procedures, and prognosis of palliative surgery for PAIS. This report describes a successful salvage surgical case for rapid hemodynamic deterioration due to PAIS obstructing the pulmonary artery trunk.

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Pneumatocele Development after Deceased-Donor Liver Transplantation for Multiple Hepatic Cysts due to Autosomal Dominant Polycystic Kidney Disease: A Case Report

Atsushi Yoshiyama, et al.

INTRODUCTION: A pneumatocele is a cystic change in the lung that can develop as a sequelae of infection, inflammation, positive-pressure ventilation, thoracic trauma, and rarely after lung resection. Pneumatocele development triggered by an extrathoracic etiology is rare. Herein, we report a case of a pneumatocele that developed after a deceased-donor liver transplantation.

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Two Cases of Single-Incision Laparoscopic Surgery for Sigmoid Colon and Rectal Cancer in Situs Inversus Totalis

Mamoru Miyasaka, et al.

INTRODUCTION: Situs inversus totalis (SIT) is a rare congenital disorder characterized by the complete inverted transposition of the thoracic and abdominal viscera. This anatomical variation complicates laparoscopic surgery, and there are currently no reports of single-incision laparoscopic surgery (SILS) for patients with sigmoid colon cancer or rectal cancer with SIT.

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Robot-Assisted Total Proctocolectomy for Familial Adenomatous Polyposis with Multiple Colorectal Cancers Using the Hugo RAS System

Yu Yoshida, et al.

INTRODUCTION: Experience with the Hugo RAS system in robot-assisted colorectal surgery is limited. This is particularly noticeable when focusing on complex procedures, such as total proctocolectomy (TPC). This study aimed to demonstrate the feasibility and safety of using the Hugo RAS system for TPC.

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Successful Conversion Surgery for Locally Advanced Pancreatic Neuroendocrine Carcinoma: A Case Report

Yuuko Tohmatsu, et al.

INTRODUCTION: Pancreatic neuroendocrine carcinoma (panNEC) is a poorly differentiated, highly malignant neoplasm with an extremely poor prognosis. This tumor often presents as locally advanced or unresectable at the initial diagnosis.

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