Publications by authors named "Giovanni DE Manzoni"

The Esophageal Adenocarcinoma Study Group Europe (EACSGE) recently proposed a granular histologic classification of esophageal-esophago-gastric junctional adenocarcinomas (EA-EGJAs) based on the study of naïve surgically resected specimens that, when combined with the pTNM stage, is an efficient indicator of prognosis, molecular events, and response to treatment. In this study, we compared histologic classes of endoscopic biopsies taken before surgical resection with those of the surgical specimen, to evaluate the potential of the EACSGE classification at the initial diagnostic workup. A total of 106 EA-EGJA cases with available endoscopic biopsies and matched surgical resection specimens were retrieved from five Italian institutions.

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Importance: Evidence suggests that prophylactic abdominal drainage after gastrectomy for cancer may reduce postoperative morbidity and hospital stay but this evidence comes from small studies with a high risk of bias. Further research is needed to determine whether drains safely meet their primary purpose of identifying and managing postoperative intraperitoneal collections without the need for reoperation or additional percutaneous drainage.

Objective: To determine whether avoiding routine abdominal drainage increased postoperative invasive procedures.

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Malnutrition is common in patients affected by esophago-gastric cancers and has a negative impact on both clinical and economic outcomes. Yet not all patients at risk of malnutrition are routinely assessed and receive appropriate support. Further, available research does not provide a mean for standardization of timing, route, and dosage for nutritional support, and this is particularly true for enteral nutrition via feeding jejunostomy.

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Article Synopsis
  • Various anastomotic and reconstruction techniques were assessed in patients undergoing minimally invasive total (miTG) and distal gastrectomy (miDG) to understand their impact on postoperative complications.
  • A study involving over 4,200 patients found that miTG had significantly higher rates of complications like anastomotic leakage and overall morbidity compared to miDG.
  • The findings suggest that miDG is preferable for patients needing surgery, while linear stapled techniques should be favored in miTG to minimize risks.*
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Article Synopsis
  • - Gastro-esophageal cancers (GECs) are serious illnesses with rapidly evolving management techniques, and the European Society of Surgical Oncology (ESSO) is focused on enhancing knowledge in this area through a multidisciplinary approach.
  • - The review covers various aspects of GEC management, including oligometastatic cancers, peritoneal metastases, Siewert Type II tumors, robotic surgery, and the use of molecular markers and immune therapies.
  • - The goal is to provide an updated overview of GEC management practices, highlight recent advancements, and promote discussions among surgical oncologists globally, benefiting both seasoned and training professionals in the field.
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The incidence of gastric cancer (GC) is expected to increase to 1.77 million cases by 2040. To improve treatment outcomes, GC patients are increasingly treated with neoadjuvant chemotherapy (NAC) prior to curative-intent resection.

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Introduction: The OligoMetastatic Esophagogastric Cancer (OMEC) project aims to provide clinical practice guidelines for the definition, diagnosis, and treatment of esophagogastric oligometastatic disease (OMD).

Methods: Guidelines were developed according to AGREE II and GRADE principles. Guidelines were based on a systematic review (OMEC-1), clinical case discussions (OMEC-2), and a Delphi consensus study (OMEC-3) by 49 European expert centers for esophagogastric cancer.

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Background: Many gastric cancer patients in Western countries are diagnosed as metastatic with a median overall survival of less than twelve months using standard chemotherapy. Innovative treatments, like targeted therapy or immunotherapy, have recently proved to ameliorate prognosis, but a general agreement on managing oligometastatic disease has yet to be achieved. An international multi-disciplinary workshop was held in Bertinoro, Italy, in November 2022 to verify whether achieving a consensus on at least some topics was possible.

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Background: The aim of the present study is to compare outcomes of the robotic hand-sewn, linear- and circular-stapled techniques performed to create an intrathoracic esophagogastric anastomosis in patients who underwent Ivor-Lewis esophagectomy.

Methods: Patients who underwent a planned Ivor-Lewis esophagectomy were retrospectively analysed from prospectively maintained databases. Only patients who underwent a robotic thoracic approach with the creation of an intrathoracic esophagogastric anastomosis were included in the study.

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Article Synopsis
  • The study investigates how the stroma (connective tissue) surrounding poorly cohesive gastric cancer (PCGC) affects cancer cell adaptation and patient outcomes.
  • Researchers classified 75 PCGC specimens as stroma-rich (SR) or stroma-poor (SP) and found that SR tumors are linked to deeper tumor invasion and worse survival rates compared to SP tumors.
  • Additionally, mRNA analysis showed that KRT8 levels correlate with tumor behavior, where KRT8-high tumors had better survival outcomes, highlighting the role of stromal content and extracellular proteins in determining tumor aggression and patient prognosis.
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The overall frequency of postoperative complications in patients with esophageal and gastric cancer diverges between studies. We evaluated the frequency and assessed the relationship between complications and demographic and clinical features. For this observational study, data were extracted from the ERAS Registry managed by the University of Verona, Italy.

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The optimal treatment for esophageal cancer in elderly patients is still debated and data on postoperative results are limited. This retrospective international study aims to clarify the impact of age on clinical and oncological outcomes after esophagectomy. All patients that underwent esophagectomy for cancer between 2007 and 2016 at two European high-volume Centers have been included in the study.

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Background: Gastric cancer (GC) is the third leading cause of cancer-related death worldwide, with a poor prognosis for patients with advanced disease. Since the oncogenic role of KRAS mutants has been poorly investigated in GC, this study aims to biochemically and biologically characterize different KRAS-mutated models and unravel differences among KRAS mutants in response to therapy.

Methods: Taking advantage of a proprietary, molecularly annotated platform of more than 200 GC PDXs (patient-derived xenografts), we identified KRAS-mutated PDXs, from which primary cell lines were established.

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Article Synopsis
  • Interest in metastatic gastric cancer is rising, with the META-GASTRO registry aiming to gather clinical data on oligometastatic patients to guide multimodal treatment, including surgery.
  • The study analyzed data from 383 patients, identifying oligometastatic cases through two definitions: quantitative/anatomical (specific site metastases) and dynamic (percentage based on site), finding relevant statistical significance.
  • The results indicated that 30% of patients fit the quantitative definition and 16% the dynamic definition, with outcomes for conversion therapy similar to those who had surgery after initial chemotherapy.
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Background: Conflicting results about the prognostic relevance of signet ring cell histology in gastric cancer have been reported. We aimed to perform a meta-analysis focusing on the clinicopathological features and prognosis of this subgroup of cancer compared with other histologies.

Methods: A systematic literature search in the PubMed database was conducted, including all publications up to 1 October 2021.

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Introduction: Oncovascular surgery (the removal of major blood vessels infiltrated by cancer) is challenging but can be key to achieve complete cytoreduction in patient with advanced ovarian cancer. The aim of this study was to review the literature on oncovascular surgery in ovarian cancer and to report the details of all the cases performed at our institution.

Methods: We retrospectively reviewed the database of ovarian cancer patients who underwent debulking surgery at the Department of Obstetrics and Gynecology of Verona University between January 2021 and 2023.

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Metastatic gastric cancer (mGC) often has a poor prognosis and may benefit from a few targeted therapies. Ramucirumab-based anti-angiogenic therapy targeting the VEGFR2 represents a milestone in the second-line treatment of mGC. Several studies on different cancers are focusing on the major VEGFR2 ligand status, meaning VEGFA gene copy number and protein overexpression, as a prognostic marker and predictor of response to anti-angiogenic therapy.

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Objective: To assess the rate of textbook outcome (TO) and textbook oncological outcome (TOO) in the European population based on the GASTRODATA registry.

Background: TO is a composite parameter assessing surgical quality and strongly correlates with improved overall survival. Following the standard of treatment for locally advanced gastric cancer, TOO was proposed as a quality and optimal multimodal treatment parameter.

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Gastric cancer (GC) continues to be one of the leading types of malignancies worldwide, despite an ongoing decrease in incidence. It is the fifth most frequent type of cancer in the world and the fourth leading cause of cancer death. Peritoneal metastases (PMs) occur in 20-30% of cases during the natural history of the disease.

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Background: This study evaluated the efficacy of pressurized intraperitoneal aerosol chemotherapy (PIPAC) with systemic chemotherapy as a bidirectional approach for gastric cancer (GC) patients with synchronous peritoneal metastases (SPM).

Methods: A retrospective analysis of a prospective PIPAC database was queried for patients who underwent a bidirectional approach between October 2019 and April 2022 at two high-volume GC surgery units in Italy (Verona and Siena). Surgical and oncological outcomes were analyzed.

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Article Synopsis
  • Despite negative results in broader clinical trials for gastric cancer, PARP inhibitors (PARPi) could still benefit a small group of patients with specific genetic mutations. !* -
  • Research using patient-derived xenografts showed that gastric cancer tumors with BRCA2 mutations respond well to olaparib, particularly when combined with oxaliplatin. !* -
  • Overall, patients with gastric cancer who have BRCA2 mutations or high homologous recombination deficiency (HRD) scores may find PARP inhibition to be an effective treatment option, making genetic testing advisable for these individuals. !*
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