Publications by authors named "Shigetsugu Takano"

Liver function affects the prognosis of patients with hepatocellular carcinoma (HCC). This study aimed to investigate the prognostic impact of the functional liver imaging score (FLIS), assessed using gadoxetic acid-enhanced magnetic resonance imaging, on long-term outcomes following hepatectomy for HCC. The FLIS was assessed in 235 patients who underwent initial hepatectomy for HCC.

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Background: The prognosis of perihilar cholangiocarcinoma (PHC) is poor even after curative resection, highlighting the need for effective adjuvant chemotherapy. The efficacy of adjuvant S-1 chemotherapy following major hepatectomy for PHC is unclear, and thus the aim of this study was to elucidate this.

Methods: Consecutive patients with PHC who underwent major hepatectomy (hemihepatectomy or trisectionectomy extending to segment 1 with extrahepatic bile duct resection) at three high-volume centers in Japan from 2007 to 2020 were retrospectively evaluated.

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A 50-year-old male with a pancreatic tail tumor underwent distal pancreatectomy. At 14 and 27 months after the primary surgery, metachronous liver metastases were identified and partial hepatectomies were performed for each. Pathologic findings of the primary pancreatic tumor were heterogeneous, but they essentially categorized into two components based on their cytologic features: (i) clear cell component and (ii) epithelioid cell component.

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Article Synopsis
  • The Japan Pancreas Society released the eighth edition of its classification for pancreatic carcinoma in 2023, highlighting several updates.
  • The updated classification maintains a focus on local invasion factors for the T category, as opposed to tumor size, and introduces a redefined naming system for lymph nodes with added location-based definitions.
  • Significant improvements include the incorporation of peritoneal cytology in the distant metastasis category and enhanced criteria for diagnosing tumors via endoscopic ultrasound-guided fine-needle aspiration biopsy (EUS-FNAB).
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Background: Although some clinical trials have demonstrated the benefits of neoadjuvant therapy for resectable pancreatic ductal adenocarcinoma (PDAC), its optimal candidate has not been clarified. This study aimed to detect predictive prognostic factors for resectable PDAC patients who underwent upfront surgery and identify patient cohorts with long-term survival without neoadjuvant therapy.

Patients And Methods: A total of 232 patients with resectable PDAC who underwent upfront surgery between January 2008 and December 2019 were evaluated.

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Pancreatic ductal adenocarcinoma (PDAC) has a very poor prognosis. Neoadjuvant chemotherapy is an effective PDAC treatment option, but chemotherapy causes unfavorable side effects. Glucocorticoids (e.

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Pancreatic cancer is an intractable malignancy associated with a dismal prognosis. Undifferentiated carcinoma, a rare subtype, poses a clinical challenge owing to a limited understanding of its molecular characteristics. In this study, we conducted genomic analysis specifically on a case of undifferentiated carcinoma of the pancreas exhibiting squamous differentiation.

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Background: Intrahepatic cholangiocarcinoma (ICC) is the second most common primary liver cancer. Cases when found are often advanced with vascular invasion, and radical resection is often difficult. Despite curative resection, the postoperative recurrence rate of patients with histological lymph node metastasis is high, and their prognosis is poor.

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Serial pancreatic juice aspiration cytological examination(SPACE)has been reported as a reliable preoperative diagnostic method for early pancreatic cancer, when combined with imaging findings suspecting early pancreatic cancer. Among 259 patients with suspected pancreatic cancer who underwent pancreatic resection at our hospital, SPACE was preoperatively performed in 14 cases(5.4%).

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A 73-year-old female was diagnosed with gallbladder cancer, but the future liver remnant volume was deemed insufficient for curative resection. Consequently, transileocolic portal vein embolization was performed. During laparotomy, multiple nodules were palpable on the peritoneal surface of the pelvic floor.

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Background: The relationship between the course of the segment 4 hepatic artery and proximal ductal margin status in the right hepatectomy (H15678-B) for perihilar cholangiocarcinoma is unclear. This study aimed to evaluate proximal ductal margin status according to the course of the segment 4 hepatic artery in patients with perihilar cholangiocarcinoma treated with right hepatectomy.

Methods: Consecutive patients with perihilar cholangiocarcinoma who underwent a right hepatectomy between January 2006 and August 2021 were retrospectively reviewed.

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Purpose: Systemic chemotherapy is generally used for metastatic pancreatic cancer; however, pulmonary resection may be a treatment option for lung oligometastases from pancreatic cancer. The current study aimed to clarify the oncological outcomes and clinical benefits of pulmonary resection for lung metastases.

Methods: Of 510 patients who underwent pancreatic resection for pancreatic cancer, 44 patients with recurrence of isolated lung metastases and one patient with simultaneous lung metastases were evaluated.

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Article Synopsis
  • * Out of 234 patients analyzed, 117 had malignant IPMNs, with cyst diameter, enhancing mural nodules on imaging, and high serum elastase-1 levels identified as significant predictors of malignancy.
  • * Serum elastase-1 was determined to be a more reliable biomarker for predicting malignant IPMNs compared to the previously used CA19-9, highlighting its potential clinical use.
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Mucinous cystic neoplasm (MCN) is a premalignant cystic tumor of the pancreas. Resection of MCN in the distal pancreas is a standard treatment; however, at present, there is no consensus on the necessity or extent of lymph node dissection, and minimally invasive pancreatectomy is commonly the preferred surgical technique. Thus, the present study aimed to assess the efficacy of minimally invasive surgery and the extent of lymph node metastasis as factors in determining an appropriate surgical treatment for MCN.

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Ring1 and YY‑1 binding protein (RYBP) is a member of the polycomb repressive complex 1 and serves as a transcriptional suppressor via epigenetic modification. RYBP has a tumour‑suppressive role in solid tumours, but its function in colorectal cancer (CRC) remains unknown. The present study evaluated the expression of RYBP using immunohistochemistry in 140 cases of primary CRC and 11 patient‑matched cases of liver metastases.

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Background & Aims: Notch1 activation promotes ICC progression and is associated with chemoresistance; however, therapies directly targeting Notch1 showed severe adverse effects. Notch1 activation is mediated by ADAM10, a molecular scissor that separates the target protein from its substrates in the cell membrane. Tspan15 regulates ADAM10 function, but the role of Tspan15 in ICC progression is unclear.

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Purpose: Semaphorins, axon guidance cues in neuronal network formation, have been implicated in cancer progression. We previously identified semaphorin 3 C (SEMA3C) as a secreted protein overexpressed in pancreatic ductal adenocarcinoma (PDAC). We, therefore, hypothesized that SEMA3C supports PDAC progression.

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Background: Although both proximal ductal margin status and lymph node metastasis status influence the survival of patients with perihilar cholangiocarcinoma, the effect of proximal ductal margin status on survival according to lymph node metastasis status is unclear. The aim of this study was, thus, to evaluate the prognostic impact of proximal ductal margin status in perihilar cholangiocarcinoma according to the presence or absence of lymph node metastasis.

Methods: Consecutive patients with perihilar cholangiocarcinoma who underwent major hepatectomy between June 2000 and August 2021 were retrospectively reviewed.

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Pancreatic ductal adenocarcinoma (PDAC) is an aggressive malignant neoplasm with various morphologies. Recognition of histological patterns that can predict prognosis is important in pathological examination. Recently, the complex glandular pattern was defined as a morphology associating the poor prognosis in lung adenocarcinoma.

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Case 1: A 73-year-old male, who had an intraductal papillary mucinous adenocarcinoma or resectable pancreatic cancer at the uncinate process of the pancreas five years after subtotal esophagectomy for esophageal cancer, underwent pylorus preserving pancreaticoduodenectomy(PPPD). Case 2: A 68-year-old male, who also had a resectable pancreatic cancer at the uncinate process of the pancreas 3 years after subtotal esophagectomy for esophageal cancer, underwent PPPD following neoadjuvant chemotherapy. In both cases, right gastroepiploic artery and vein were preserved to maintain the perfusion of the gastric tube during surgery.

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