Publications by authors named "Guillaume Piessen"

Objective: This study evaluated recurrence-free survival (RFS) as a surrogate endpoint for overall survival (OS) in esophageal cancer.

Background: OS is regarded as the gold-standard efficacy endpoint of oncological treatments but requires long follow-up.

Methods: An integrated analysis of individual patient data (IPD) from phase III trials comparing perioperative therapies for resectable esophageal and gastroesophageal junction cancer was conducted.

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Introduction: Gastric cancer primarily affects the elderly, but surgical management varies with age. This multicenter, retrospective cohort study assessed treatment approaches and outcomes in gastric cancer patients based on age.

Methods: Between 2007 and 2017, 2,131 patients treated in French Surgical Association centers were identified.

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Background: In current guidelines, staging laparoscopy (SL) is recommended in patients with locally advanced gastric cancer (GC). This study aimed to assess the clinical practice of SL and its association with administration of systemic treatment in a European cohort of GC patients (GASTRODATA).

Methods: In this retrospective cohort study, patients with locally advanced GC who underwent multimodal treatment in 24 European centers were analyzed.

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Objective: To evaluate morbidity and mortality after minimally invasive (MIG) versus open gastrectomy (OG) for gastric cancer (GC) in a large European population, with a subgroup analysis comparing total and subtotal gastrectomy.

Summary Background Data: Real-world European studies comparing postoperative outcomes between MIG and OG are lacking.

Methods: This retrospective study included GC patients undergoing curative-intent gastrectomy between 2017 and 2021 at 24 high-volume European centers participating in the GASTRODATA registry.

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Backgrounds: Chyle leak is an infrequent complication after pancreatectomy. We aimed to investigate chyle leak management practices in France and evaluate the use of lymphography as a therapeutic tool.

Methods: A national survey on the diagnosis and treatment of chyle leak after pancreatectomy was sent to 25 surgeons from 25 expert French centers.

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Background: The optimal technique for intrathoracic esophagogastric anastomosis in esophagectomy remains undetermined. This study evaluates different anastomotic techniques in robot-assisted minimally invasive esophagectomy (RAMIE) and their impact on anastomotic leakage rates.

Materials And Methods: This observational, retrospective, comparative cohort study analyzed data obtained from the Upper GI International Robotic Association (UGIRA) Esophageal Registry.

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Background: Overall survival (OS) is the standard endpoint for oncological treatment efficacy, but requires long follow-up. The aim of this study was to evaluate pCR as a surrogate for OS in oesophageal cancer.

Methods: An integrated analysis of individual patient data (IPD) from phase III trials comparing perioperative therapies for resectable oesophageal and gastro-oesophageal junction cancer was conducted.

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Background: Preoperative nutritional management is a challenging factor in the therapeutic management of curative esophageal cancer. This study aimed to evaluate the effect of early systematic enteral nutrition (SEN), initialized before the start of neoadjuvant treatment, on the rate of postoperative complications and on overall survival (OS) and disease-free survival (DFS).

Methods: A total of 313 patients without severe weight loss of <20% and with moderate dysphagia Atkinson stage III or less who were operated for curable esophageal cancer were included in the study.

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While Prognostic Nutritional Index (PNI) is an established predictor of outcomes in Asian gastric cancer (GC) patients, data among Western populations are limited. This study assessed the predictive value of PNI in European GC patients undergoing multimodal treatment. Data from GASTRODATA, the largest European repository of GC patients undergoing gastrectomy, were collected between 2017 and 2022.

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Background: Distal pancreatectomy is frequently indicated for left-sided pancreatic neuroendocrine tumour (NET). When combined lymphadenectomy is warranted, distal pancreatectomy with splenectomy (DPS) is generally advocated to optimize lymph node dissection. The spleen-preserving distal pancreatectomy (SPDP) may represent an alternative approach.

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Background: Smoking is a major risk factor for esophageal squamous cell carcinoma (ESCC) and is linked to increased postoperative morbidity. However, its impact on long-term survival remains unclear. This study evaluated the influence of preoperative smoking status on postoperative complications and survival following esophagectomy for ESCC in a high-volume center.

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Purpose: Despite limited RCTs, neoadjuvant chemotherapy (NAC) shows promise for resectable pancreatic adenocarcinoma (rPAC). Few prospective results are available on completing the full therapeutic sequence and oncologic outcomes with NAC.

Methods: The PANACHE01-PRODIGE48 phase II trial randomly assigned 153 patients with rPAC (2:2:1) to four cycles of NAC (modified leucovorin, fluorouracil, irinotecan, and oxaliplatin [mFOLFIRINOX], arm 1; leucovorin, fluorouracil, and oxaliplatin [FOLFOX], arm 2) or up-front surgery (control) across 28 French centers (February 2017-July 2020).

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Background: Little is known regarding long-term outcomes of survivors beyond 5 years after esophagectomy. This study assesses oncological outcomes of long-term survivors of esophageal cancer.

Methods: Data is derived from a multi-center randomized controlled trial comparing neoadjuvant chemoradiotherapy (NCRT) and surgery to surgery alone for clinically stage I and II esophageal cancers (FFCD9901).

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The prognosis for esophageal cancer remains poor because it is often diagnosed late and patients often have unfavourable backgrounds. This is reflected in standardised 5-year net survival rates of no more than 20%, regardless of gender. Unlike gastric cancer (CDH1 gene mutation), there is currently no genetic predisposition to esophageal cancer that would justify prophylactic esophagectomy.

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Background: The number of studies exploring esophageal motility disorders using high-resolution manometry (HRM) in patients with esophageal diverticula (ED) is limited. The goal of this study was to describe motility disorders using HRM in patients with ED and assess the added value of provocative testing in these patients.

Methods: Patients with ED who underwent HRM between 2010 and 2022 were retrospectively included.

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Introduction: Palliative chemotherapy is the current standard among advanced gastric cancer (GC) patients with peritoneal metastasis (PM), while the role of gastrectomy with cytoreductive surgery and HIPEC remains unclear. The current study aimed to assess treatment outcomes among GC patients with PM undergoing gastrectomy and hyperthermic intraperitoneal chemotherapy (HIPEC) using multinational cancer registries.

Methods: The analysis (2012-2022) included stage IV GC patients with PM undergoing gastrectomy and HIPEC from the European GASTRODATA Registry (EU cohort) and the American National Cancer Database (NCDB, U.

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Background: The use of surrogate endpoints may expedite the reporting of study outcomes of clinical trials. The validity of disease-free survival (DFS) as a surrogate for overall survival (OS) in the neoadjuvant treatment of esophageal (E) or gastroesophageal junctional (GEJ) carcinomas remains uncertain.

Objective: To evaluate DFS as a surrogate end-point for OS in E/GEJ using the meta-analytical approach DESIGN, SETTING, AND PARTICIPANTS: individual patient data from an international meta-analysis on operable locally advanced E/GEJ, which including randomized trials comparing at least two of the neo-adjuvant treatment strategies: upfront surgery (S), chemotherapy followed by surgery (CS), and/or chemoradiotherapy followed by surgery (CRS).

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Background: Malnutrition is common with esophagogastric cancers and is associated with negative outcomes. We aimed to evaluate if immunonutrition during neoadjuvant treatment improves patient's health-related quality of life (HRQOL) and reduces postoperative morbidity and toxicities during neoadjuvant treatment.

Methods: A multicenter double-blind randomized controlled trial (RCT) was undertaken.

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Background: The use of multiagent FOLFIRINOX chemotherapy for pancreatic adenocarcinoma in a neoadjuvant setting has been associated with an increased rate of complete pathological response (CPR) after surgery. This study investigated the long-term outcomes of patients with CPR in a multicenter setting to identify prognostic factors for overall survival (OS) and recurrence-free survival (RFS).

Methods: This retrospective cohort study examined biopsy-proven pancreatic adenocarcinomas with CPR after neoadjuvant chemotherapy or chemoradiotherapy and surgery, between January 2006 and December 2023 across 22 French and  2 Belgian centers.

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Introduction: The impact of overweight and obesity on pathological outcomes, complications, and oncologic outcomes following surgery for gastric adenocarcinoma has been poorly reported in Western populations. This study aimed to better understand the impact of overweight and obesity on both surgical and oncological outcomes in patients who underwent surgery for gastric cancer.

Methods: Data were retrospectively collected from a multi-institutional European database.

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Background: The potential oncological benefit of extending the waiting period between neoadjuvant radiochemotherapy and surgical resection for rectal cancer is debated.

Objective: To evaluate the impact of prolonging this waiting period on the 5-year oncological prognosis and 2-year functional result of locally advanced rectal adenocarcinoma.

Design: Phase III, multicenter, randomized, open-label, parallel-group, controlled trial.

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Article Synopsis
  • This study evaluates the effectiveness of Robot-assisted minimally invasive esophagectomy (RAMIE) for treating esophageal cancer at various centers globally, aiming to pinpoint areas for enhancement in surgical outcomes.
  • Over three time periods (2016-2023), data from 28 centers was analyzed, revealing improvements in textbook outcome rates, lymph node yields, and decreased hospital stays, particularly with McKeown procedures.
  • The results showed varying success rates in surgical outcomes and complications, with a noteworthy decrease in anastomotic leakage rates and hospital stays over time, highlighting advancements in surgical techniques.
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Context: Gastric and oesophageal cancers are common. They are also expected to increase in incidence in the next few years and are characterized by poor prognosis. Surprisingly, whereas the incidence of severe anxiety and depression is high in patients with gastric and oesophageal cancers, the influence of symptoms of depression and anxiety on postoperative complications has barely been explored.

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