Publications by authors named "Satoshi Nara"

Aim: Multidisciplinary team (MDT) intervention is generally recommended in patients with distant metastatic colorectal cancer (DMCRC). However, it is not clear whether MDT intervention has a favourable impact on prognosis. We investigated the impact of MDT intervention on improving long-term prognosis in DMCRC.

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A previously healthy 63-year-old woman, unvaccinated for influenza A, had a mild fever for a week followed by alerted consciousness. On the day of admission, she developed shortness of breath, high fever, hypotension and alterations of consciousness. Chest CT revealed rapidly progressing bilateral infiltrates.

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Background: Treatment of liver metastases from rectal cancer has been considered based on research data on liver metastases from colorectal cancer. This study aimed to clarify the impact of clinicopathological factors of the primary lesion, including rectal cancer-specific factors such as lateral lymph node metastasis, on the prognosis after liver resection.

Methods: This was a single-center retrospective study of patients undergoing curative surgical treatment for resectable liver metastases from rectal cancer from January 2010 to June 2023.

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Background: This study aimed to identify prognostic factors and treatment patterns at the first recurrence of retroperitoneal liposarcoma (LPS).

Methods: Medical records of 150 patients who underwent resection for primary retroperitoneal LPS were reviewed. Of the 94 patients with local or distant recurrence, prognostic factors and treatment approaches were retrospectively analyzed.

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Background: Systemic therapy, including liver resection, is crucial for treating metastatic liver tumors. Even when radical resection is successful, early recurrence of advanced or metastatic liver tumors may restrict subsequent treatment options, particularly if delayed liver function recovery (DLFR) occurs after hepatectomy. This study focused on DLFR after right hepatectomy for metastatic liver tumors.

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Background: Lymph node dissection is required for many pancreatic neuroendocrine neoplasms. However, the need for such dissection has rarely been examined in detail by the tumor size, tumor location, or World Health Organization grading. The objective is to determine which characteristics of pancreatic neuroendocrine neoplasms require lymph node dissection, and to what extent lymph node dissection should be performed.

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Background: With the advent of improved chemotherapy options, neoadjuvant chemotherapy has gained acceptance as a multidisciplinary treatment approach for localized pancreatic ductal adenocarcinoma. This study aimed to clarify whether neoadjuvant chemotherapy with gemcitabine and S-1 influences preoperative nutritional status and postoperative outcomes, particularly in patients undergoing highly invasive pancreatic resection.

Methods: Patients with resectable pancreatic ductal adenocarcinoma who underwent pancreaticoduodenectomy as upfront surgery or after neoadjuvant chemotherapy with gemcitabine and S-1 between January 2015 and December 2022 were assessed.

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Purpose: The clinical significance of lymph node dissection (LND) in patients with peripheral type intrahepatic cholangiocarcinoma (ICC) remains unclear. Although LND is usually performed for perihilar type ICC, there is no consensus on whether routine LND should be performed for peripheral type ICC. This study aimed to investigate the prognostic significance of LND in patients who underwent hepatectomy for peripheral type ICC.

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Background: Although activation of human epidermal growth factor receptor 3 (HER3) is linked to resistance to targeted therapies in several cancer types, the HER3 expression profile during pancreatic cancer treatment remains unknown.

Aims: We evaluated the HER3 expression status after chemotherapy for pancreatic cancer and its association with clinicopathological features and clinical outcomes.

Materials & Methods: We included patients with pancreatic cancer who underwent chemotherapy and whose post-treatment archival tissue specimens were collected.

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Background: While liver resection remains the best curative option for hepatocellular carcinoma (HCC), it is unclear whether the consistent progress of multidisciplinary approaches in managing HCC over several decades has influenced the outcomes of liver resection.

Methods: Patients undergoing liver resection for HCC from 1993 to 2022 in our institution were retrospectively assessed and stratified into three periods according to the year of liver resection, P1 (1993-2000), P2 (2001-2009), and P3 (2010-2022), and tumor status using the Barcelona Clinic Liver Cancer (BCLC) staging system.

Results: A total of 1257 patients were included (P1:P2:P3 = 385:490:382, BCLC stage 0/A:B:C = 908:214:135).

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Article Synopsis
  • Right liver tumors near the adrenal gland or inferior vena cava can complicate laparoscopic liver surgery, making it difficult to access the liver.
  • To address this, researchers combined laparoscopic liver resection with a technique called retroperitoneoscopy, allowing better access to the liver's dorsal side without moving the right liver.
  • The new method, termed "retlap liver resection," was successfully performed on six patients from 2020 to 2022 without any complications, and the study provides a video demonstration of the procedure.
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Background: Postoperative pancreatic fistula (POPF) is a major complication of distal pancreatectomy (DP). Although the visceral fat area (VFA) is a risk factor for POPF in DP, its measurement is complicated. This study aimed to identify a simple marker as a predictive indicator of POPF.

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Background: The prognostic implications of the RAS status in colorectal cancer liver metastasis (CRLM) remain unclear. This study investigated the prognostic significance of RAS status after curative hepatectomy, focusing on surgical controllability.

Methods: This retrospective study included liver-only CRLM patients who underwent the first hepatectomy between 2015 and 2022 at the National Cancer Center Hospital.

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Article Synopsis
  • * Analyzing data from 1183 patients, it found that completing 6 months of postoperative adjuvant therapy significantly improved overall, disease-specific, and recurrence-free survival, especially for high-risk patients.
  • * Additionally, neoadjuvant therapy showed benefits for those with borderline resectable IPMC, and any treatment for recurrence after surgery was linked to longer survival compared to no treatment.
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  • A multicenter study analyzed the effects of conversion surgery (CS) after chemotherapy on patients with initially unresectable pancreatic cancer (PC) from 2014 to 2018.
  • The results showed that patients who underwent surgery had significantly longer overall survival (OS) compared to those who continued with chemotherapy alone, with median OS being 34.4 months for the surgery group versus 19.8 months for the control group.
  • Postoperative complications were present in about 19.6% of surgery patients, but the study concluded that CS following effective chemotherapy can improve the prognosis of patients with previously unresectable PC, regardless of the time spent on chemotherapy.
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Purpose: This study aimed to evaluate the feasibility, safety, diagnostic yield, and technical aspects of percutaneous abdominal lavage cytology screening (PACS) in patients with resectable pancreatic cancer.

Methods: This single-center, retrospective study included patients with resectable pancreatic cancer who underwent PACS before pancreatectomy between May 2022 and October 2023. The technical success rate, position of the drainage tube, volume of fluid administered, volume of fluid retrieved, fluid retrieval rate, and adverse events were evaluated.

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Article Synopsis
  • EUS tissue acquisition (EUS-TA) is an effective method for diagnosing small solid pancreatic lesions (≤10 mm), with a high technical success rate of 99.1% in a study of 109 patients.
  • The study found strong diagnostic performance metrics, including a sensitivity of 90.1%, specificity of 97.3%, and overall accuracy of 92.6%.
  • Important factors influencing diagnostic accuracy included the number of punctures and tumor type, while no instances of needle-tract seeding were reported.
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Background: The incidence of non-hepatitis B and non-hepatitis C hepatocellular carcinoma (NBNC-HCC) is increasing in our country. This study assesses the feasibility of employing an identical surgical treatment strategy for resectable NBNC-HCC as that for hepatitis virus-associated HCC (HV-HCC).

Methods: A retrospective analysis (1993-2023) of 1321 curative liver resections for HCC at a single institution was performed.

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Purpose: Whether surgical intervention for patients with oligometastatic recurrence can improve their post-recurrent prognosis is unclear. In this study, we introduce a novel concept of oligometastasis in post-surgical pancreatic ductal adenocarcinoma (PDAC) patients with hepatic recurrence, which we call "oligo-like liver metastasis (OLLM)." Patients with OLLM have better post-recurrence prognosis and could therefore be eligible for surgical intervention.

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Article Synopsis
  • Patients with distal cholangiocarcinoma (DCC) often have high recurrence rates and poor survival outcomes, prompting this study to examine the effect of surgical margin status on these factors.
  • A retrospective analysis of 133 patients showed that while 21.8% had R1cis and 17.3% had R1inv margins, surgical margin status did not significantly affect overall and recurrence-free survival rates.
  • However, R1 status was associated with a higher likelihood of isolated distant recurrence, suggesting that comprehensive treatment approaches are crucial for improving patient outcomes.
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  • Peptide receptor radionuclide therapy (PRRT) proves effective in treating unresectable liver metastases from pancreatic neuroendocrine tumors (PNETs), leading to rare surgical opportunities.
  • A case study of a 52-year-old man shows that after PRRT treatment and the use of somatostatin analogs (SSAs), previously unresectable liver metastases became operable, resulting in no viable tumor cells post-surgery.
  • The findings emphasize the potential of combining PRRT and SSAs as a promising multimodal treatment for patients with difficult-to-operate PNETs.
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  • Researchers studied apolipoprotein A2-isoforms (apoA2-is) as potential biomarkers for early-stage pancreatic cancer and developed a new diagnostic assay for them.
  • The study included 2732 plasma samples and showed that apoA2-ATQ/AT has a higher ability to distinguish pancreatic cancer from healthy controls compared to the traditional biomarker CA19-9.
  • ApoA2-ATQ/AT also demonstrated better sensitivity for detecting early-stage pancreatic cancers, and using it in combination with CA19-9 boosted detection rates significantly.
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Single-molecule enzyme activity-based enzyme profiling (SEAP) is a methodology to globally analyze protein functions in living samples at the single-molecule level. It has been previously applied to detect functional alterations in phosphatases and glycosidases. Here, we expand the potential for activity-based biomarker discovery by developing a semi-automated synthesis platform for fluorogenic probes that can detect various peptidases and protease activities at the single-molecule level.

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Objectives: Signs of life (SOLs) during cardiac arrest (gasping, pupillary light reaction, or any form of body movement) are suggested to be associated with favorable neurologic outcomes in out-of-hospital cardiac arrest (OHCA). While data has demonstrated that extracorporeal cardiopulmonary resuscitation (ECPR) can improve outcomes in cases of refractory cardiac arrest, it is expected that other contributing factors lead to positive outcomes. This study aimed to investigate whether SOL on arrival is associated with neurologic outcomes in patients with OHCA who have undergone ECPR.

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