Kazunori Masahata

Laparoscopic Appendectomy for Acute Appendicitis With Adnexal Adhesion During the Third Trimester of Pregnancy: A Case Report

Kazunori Masahata, Takeya Hara, Rikuto Hirose, Yoshimasa Oyama et autres

Acute appendicitis during pregnancy is associated with maternal/fetal complications. Although laparoscopic appendectomy is widely accepted for managing appendicitis, limited data are available regarding laparoscopy in cases occurring during the third trimester of pregnancy. We present the case of a patient in the …

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Current status of neonatal surgery in Japan: An analysis of data from the National Clinical Database Pediatric Surgical Registry

Kazunori Masahata, Hisateru Tachimori, Tetsuya Ishimaru, Naonori Kawakubo et autres

PURPOSE: To evaluate the current status of neonatal surgery in Japan based on the National Clinical Database-Pediatric (NCD-P) registry, a survey conducted every 5 years by the Committee of the Japanese Society of Pediatric Surgeons. METHODS: We summarized and compared the survey …

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Laparoscopic Drainage of Severe Intra-abdominal Abscesses Following Cesarean Section: A Case Report

Kazunori Masahata, Takuya KUSHIMOTO, Shohei Maékawa, Rikuto Hirose et autres

We report a rare case of a 29-year-old pregnant woman with obesity who developed a severe intra-abdominal abscess after an emergency cesarean section (CS) for labor arrest. The patient presented with persistent fever and lower abdominal pain after CS. Enterococcus faecalis was …

Omental Torsion Diagnosed and Treated with Single-Incision Laparoscopic Surgery in 2 Pediatric Patients: A Case Report

Shohei Maékawa, Masafumi Kamiyama, Chisato Fujita, Daishi Takao et autres

INTRODUCTION: Omental torsion (OT), caused by twisting of the greater omentum around its axis, leading to reduced blood supply to the distal aspect of the omentum and tissue infarction, is a rare disease that manifests clinically as acute abdominal pain. Accurate preoperative …

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Balloon dilatation for congenital esophageal stenosis associated with esophageal atresia

Kōichi Deguchi, Masafumi Kamiyama, Kazunori Masahata, Motonari Nomura et autres

PURPOSE: Congenital esophageal stenosis (CES) associated with esophageal atresia (EA) is rare, and no standard treatment has been established. We reviewed cases of EA-associated CES to assess the clinical characteristics and treatment outcomes, especially the feasibility of endoscopic dilatation. METHODS: We retrospectively …

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Reply to Letter to the Editor by Lohmann and Fernandes

Kazunori Masahata, Kouji Nagata, Keita Terui, Takuya Kondo et autres

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The hybrid CL-SP-D molecule has the potential to regulate xenogeneic rejection by human neutrophils more efficiently than CD47

Keigo Iemitsu, Rieko Sakai, Akira Maeda, Katarzyna Gadomska et autres

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Risk Factors for Preoperative Pneumothorax in Neonates With Isolated Left-Sided Congenital Diaphragmatic Hernia: An International Cohort Study

Kazunori Masahata, Kouji Nagata, Keita Terui, Takuya Kondo et autres

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Potential risks associated with laparoscopic gastrostomy in patients with the COL4A1 variant: Two case reports

Kōichi Deguchi, Ryuta Saka, Marie Todo, Chiyoshi Toyama et autres

The COL4A1 (collagen Type 4 alpha1) pathogenic variant is associated with porencephaly and schizencephaly and accounts for approximately 20% of these patients. This gene variant leads to systemic microvasculopathy, which manifests as brain, ocular, renal, and muscular disorders. However, only a few …

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237.1: The suppression of xenogeneic NK cell degranulation by human CD31

Akira Maeda, Shuhei Kogata, Pei‐Chi Lo, Keigo Iemitsu et autres

Introduction: Cellular xenogeneic rejection by the innate immune system is one of the most important immunological obstructions after the alpha-Gal-knocked out era. We previously demonstrated that hCD31 on swine endothelial cell (SEC) suppresses the xenogeneic reaction by neutrophil. This suppression is induced …

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216.5: The hybrid molecule CL-SP-D has the potential to regulate xenogeneic rejection by human neutrophils

Shuji Miyagawa, Keigo Iemitsu, Akira Maeda, Rieko Sakai et autres

Objective: In this study, we studied the effect of expression of human CD47 and CL-SP-D on swine endothelial cells (SECs) for the inhibition of xenogeneic rejection by neutrophils. Methods: The cDNA for the carbohydrate recognition domain (CRD) of human surfactant protein D …

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Stapleless thoracoscopic lobectomy for congenital pulmonary airway malformation: a simple technique in thoracoscopic surgery

Kazunori Masahata, Naoko Uga, Motonari Nomura, Masafumi Kamiyama et autres

Abstract Congenital pulmonary airway malformation (CPAM) is a developmental malformation that affects the lung parenchyma, especially terminal respiratory bronchioles. This paper reports a case of an infant diagnosed with CPAM who underwent stapleless thoracoscopic lobectomy using Hem-o-Lok clips®. Computed tomography showed cystic …

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