Masakazu Yamamoto
Tohoku University
CancerInternal medicineRadiologySurgeryPathologyOncologySurvival rateHepatectomyCarcinomaHepatocellular carcinomaPancreasBile ductSurgical oncologyIntrahepatic CholangiocarcinomaCancer researchColorectal cancerGeneral surgeryMedicineBiologyGastroenterology
634Publications
63H-index
11.1kCitations
Publications 639
Newest
PURPOSE Artificial intelligence-enabled techniques can process large amounts of surgical data and may be utilized for clinical decision support to recognize or forecast adverse events in an actual intraoperative scenario. To develop an image-guided navigation technology that will help in surgical education, we explored the performance of a convolutional neural network (CNN)-based computer vision system in detecting intraoperative objects. METHODS The surgical videos used for annotation were reco...
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#1Kimitaka TaniH-Index: 1
#2Michio ItabashiH-Index: 14
Last. Masakazu YamamotoH-Index: 63
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BACKGROUND Although conventional one-step nucleic acid amplification (OSNA) is a useful molecular-staging method, its complexity hinders its use in clinical practice. A pooled approach for OSNA (pOSNA) has been evaluated for its feasibility in pathologically node-negative colon cancer (pNNCC) for molecular staging of lymph node metastasis in clinical practice. METHODS Subjects were patients diagnosed with clinical stage II-IIIA colon cancer between January 2017 and September 2018. pOSNA involved...
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Purpose It has been reported that there are left and right hepatic arterial arcades via the blood vessels around the hilar bile duct; therefore, when the hilar bile duct is preserved, hepatic artery reconstruction may not be necessary. We compared the short-term and long-term outcomes in patients with distal cholangiocarcinoma who underwent pancreatoduodenectomy (PD) with right hepatic artery resection without right hepatic artery reconstruction (RHAR group) with those patients who underwent con...
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#1Masahiro Shiihara (Tohoku University)H-Index: 4
#2Tomohiko Ishikawa (Tohoku University)H-Index: 2
Last. Toru Furukawa (Tohoku University)H-Index: 57
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BACKGROUND Pancreatobiliary cancer is a highly aggressive tumour with a dismal prognosis. Personalised medicine represents a promising and effective therapeutic approach for this intractable disease. In this study, we aimed to establish a system for identifying and testing genotype-oriented targeted drugs for pancreatobiliary cancers by combining exome sequencing and organoid culture of primary tumours. METHODS Tumour cells isolated from resected tumours were subjected to organoid cultures based...
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#1Akiko SerizawaH-Index: 2
#2Hidekazu KuramochiH-Index: 1
Last. Masakazu YamamotoH-Index: 63
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Background The efficacy of different types of preoperative biliary drainage for cholangiocarcinoma has been debated over the past two decades. Controversy concerning the use of percutaneous transhepatic biliary drainage (PTBD) versus endoscopic biliary drainage (EBD) still exists. This study aimed to compare the long-term outcomes between PTBD and EBD in patients with distal cholangiocarcinoma. Methods Data of patients diagnosed with distal cholangiocarcinoma who underwent preoperative PTBD or E...
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#1Wataru IzumoH-Index: 6
#2Ryota HiguchiH-Index: 25
Last. Masakazu YamamotoH-Index: 63
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The role of pancreatectomy for very elderly patients with pancreatic adenocarcinoma is controversial. This study aimed to clarify the validity of pancreatic resection in octogenarian patients with pancreatic ductal adenocarcinoma. We compared 31 patients aged ≥ 80 years and 548 patients aged < 80 years who underwent pancreatectomy for pancreatic ductal adenocarcinoma and evaluated the relationship between age, clinicopathological factors, recurrence, and outcomes. Postoperative mortality, morbid...
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#1Hyeong Seok Kim (New Generation University College)H-Index: 4
#2Wookyeong Song (UPR-RP: UPRRP College of Natural Sciences)
Last. Jin-Young Jang (New Generation University College)H-Index: 54
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BACKGROUND Although we previously proposed a nomogram to predict malignancy in intraductal papillary mucinous neoplasms (IPMN) and validated it in an external cohort, its application is challenging without data on tumor markers. Moreover, existing nomograms have not been compared. This study aimed to develop a nomogram based on radiologic findings and to compare its performance with previously proposed American and Korean/Japanese nomograms. METHODS We recruited 3708 patients who underwent surgi...
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#1Yuri OgasawaraH-Index: 1
#2Tomomi KogisoH-Index: 13
Last. Katsutoshi TokushigeH-Index: 40
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PURPOSE Adult-onset Still's disease (AOSD) is an inflammatory condition commonly complicated by mild liver dysfunction. However, severe liver failure is rarely reported. We report three cases of severe acute hepatic failure (ALF) associated with AOSD. We encountered three cases of acute liver failure (ALF) with encephalopathy. RESULTS Case 1 was a 75-year-old female, who was started on a steroid (prednisolone, PSL) to treat AOSD; this was gradually tapered. Two months later, severe ALF developed...
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