Publications by authors named "Roland Croner"

Pathological sections hold rich diagnostic information, yet their prognostic potential is underutilized. This study leverages deep learning to predict outcomes, advancing precision oncology of pathological sections with focus on pancreatic cancer. We analyzed H&E-stained whole section images of 125 cases from public databases as well as 28 real-world patients with pancreatic cancer and precancerous lesions.

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: SIMPLR-2 is a follow-up to the international, multicenter SIMPLR-1 study evaluating long-term oncological outcomes after open (OLP), laparoscopic (LLP), and robotic (RLP) left pancreatectomy for pancreatic ductal adenocarcinoma (PDAC). : A retrospective analysis of 71 PDAC patients from three high-volume centers was performed. Surgical approaches were stratified into open, laparoscopic, and robotic.

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IntroductionThe OCRA Tabletop MRI System is a compact, low-field (0.24T) magnetic resonance platform originally developed as an educational device to teach MR physics using chemical test tube-sized samples. Given its capabilities, we explored its diagnostic potential by performing relaxometric analysis on freshly resected human tissue specimens.

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Background: The clinical course of phlegmonous appendicitis (PHL) appears less severe than other complicated forms, which led to the discussion if PHL should be classified as complicated acute appendicitis (CAA). According to the guidelines of the European Association for Endoscopic Surgery (EAES) from 2015, PHL is classified as a CAA, which requires usually surgery. Therefore, this study aimed to evaluate the relevance of classifying PHL as CAA, with a focus on inflammatory markers, postoperative complications, and hospital length of stay.

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Purpose: To determine the benefit, measured as complete removal of a tumor so that no tumor cells are detectable during histopathologic examination of the resection margin (R0 resection rate), of induction chemotherapy plus chemoradiotherapy (CRT) compared with chemotherapy alone for unresectable pancreatic tumors.

Patients And Methods: CONKO-007, an investigator-initiated open-label, multicentric, phase III randomized clinical trial, enrolled 525 patients with unresectable tumors, and 495 patients received induction chemotherapy (402 with fluorouracil, irinotecan, and oxaliplatin [FOLFIRINOX] and 93 with gemcitabine). Patients without progression after 3 months of induction chemotherapy (n = 336) were randomly assigned for continuation of the same chemotherapy (n = 167) or CRT (n = 169; 50.

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Aim: To develop and operationally define 'performance metrics' that characterize a reference approach to robotic multiport right hemicolectomy with complete mesocolic excision (CME) and intracorporeal anastomosis (ICA) and to obtain evidence supporting face and content validity through a consensus meeting.

Method: Three expert colorectal surgeons with advanced minimally invasive surgical experience, a senior behavioural scientist and a colorectal surgeon with experience in performance metrics development formed the Metrics Group. Published guidelines, clinical evidence, training materials and unedited videos of robotic multiport right hemicolectomy were used to deconstruct the task-robotic right hemicolectomy with CME and ICA-into defined, observable performance units or metrics (i.

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Pancreatic cancer (PC) is a highly aggressive malignancy in humans, where early diagnosis significantly improves patient outcomes. However, effective methods for accurate and early detection remain limited. In this multiethnic study involving human subjects, we developed a liquid biopsy signature based on extracellular vesicle (EV)-derived microRNAs (miRNAs) linked to radiomics features extracted from patients' tumor imaging.

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Objective: This study aimed to establish global benchmark outcomes indicators for robotic liver resections (R-LR).

Background: In recent years, minimally invasive liver resections and in particular R-LR has seen an increase in uptake in recent years. Although, benchmark outcomes have been recently established for laparoscopic (L) -LR, this has not been established for R-LR.

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Background: Minimally invasive hepatobiliary surgery is performed increasingly either with robotic assistance or conventional laparoscopy. The lack of haptic feedback is one of the main challenges which has to be addressed during these procedures. Especially in oncological minimally invasive liver surgery Indocyanine green (ICG) can help to gain additional information for improved oncological quality.

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Introduction: The Iwate difficulty scoring system (DSS) is one of the most widely validated DSS for laparoscopic liver resection (LLR). However, these studies only validated the 4 difficulty levels and did not validate the 12-point difficulty index of the system. To address current limitations in the studies validating the Iwate difficulty scoring system (DSS), we performed an international multicenter study to validate the Iwate DSS across both its four difficulty levels and 12-point difficulty index.

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Introduction: Surgical residency programs lack structured assessments of robotic surgery. The validated O-Score is an assessment tool for tracking robotic operative proficiency consisting of 9 items on a 5 point Likert scale. Surgical autonomy is one comprehensive binary item.

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Background: Robotic liver surgery, as part of minimally invasive liver surgery (MILS), offers advantages like enhanced dexterity and stable camera and instrument control. However, the learning curve - particularly the number of cases required for proficiency - remains underexplored. This study analyzes 100 consecutive robotic liver resections performed by a single surgeon to assess the learning curve and outcomes.

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The present study employed a large scaled multicenter nationwide study data analysis to elucidate the impact of thromboembolism prophylaxis (TEP) in the context of bariatric and metabolic surgery and to investigate the peri- and postoperative complications associated with TEP. A total of 63,909 patients who underwent primary bariatric surgery between 2005 and 2020 were included in the analysis. The data were collected prospectively and multicentrically in the German Bariatric Surgery Registry (GBSR) and subsequently analyzed retrospectively.

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Background: Hepato-Pancreato-Biliary (HPB) surgery is a complex specialty and Artificial Intelligence (AI) applications have the potential to improve pre- intra- and postoperative outcomes of HPB surgery. While ethics guidelines have been developed for the use of AI in clinical surgery, the ethical implications and reliability of AI in HPB surgery remain specifically unexplored.

Methods: An online survey was developed by the Innovation Committee of the E-AHPBA to investigate the current perspectives on the ethical principles and trustworthiness of AI in HPB Surgery among E-AHPBA membership.

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Article Synopsis
  • * Among 3754 patients analyzed, results showed that males lost an average of 19.3 kg and females 16.3 kg after six months, with females experiencing greater effective weight loss relative to men.
  • * GBI appears to be a valuable treatment option for mildly obese patients and can also serve as a preparatory step for later bariatric surgery, with some advantages in health outcomes, particularly for women regarding hypertension remission.
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  • A retrospective study assessed the diagnostic effectiveness of C-reactive protein (CRP) and leucocyte count in differentiating complicated (CAA) from uncomplicated acute appendicitis (UAA) based on EAES guidelines, involving 285 patients in Germany from 2019 to 2021.
  • The study found that CRP levels were significantly higher in CAA patients compared to UAA patients, showing medium diagnostic value for identifying CAA and a cutoff at 44.3 mg/L, while leucocyte count had a low predictive value.
  • Higher CRP levels were linked to an increased risk of postoperative complications and longer hospital stays, indicating that CRP is a useful marker for diagnosing CAA within the EA
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  • Glioblastoma (GBM) is a highly aggressive brain tumor, with a subtype called mesenchymal (MES-GBM) known for its resistance to treatment.
  • Trihexyphenidyl (THP), an existing medication, has been shown to effectively inhibit the growth and survival of MES-GBM cells while sparing non-tumor cells.
  • The study suggests THP's potential for repurposing as a cancer treatment, but more research is needed to clarify its mechanisms of action and establish optimal treatment protocols.
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  • The study investigates how the length of time taken during liver surgeries affects the likelihood of postoperative complications in patients undergoing different types of liver resections.
  • A total of 5,424 patients were analyzed from multiple centers between 2000 and 2022, focusing on procedures like right hemihepatectomy, technically major resection, and left lateral sectionectomy.
  • Results show that patients in the longest operative time group had a significantly higher risk of complications, particularly in various surgical approaches like open, laparoscopic, and robotic surgeries.
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  • A study was conducted to compare robotic minor liver resections (RMLR) with laparoscopic minor liver resections (LMLR) in patients undergoing surgery on the anterolateral liver segments.
  • The analysis included over 10,000 patients and employed propensity score matching to balance the groups for accuracy in comparisons.
  • Results indicated RMLR had benefits like less blood loss, lower major morbidity, and shorter hospital stays than LMLR, although the difference in 30-day readmission rates suggested RMLR may have some drawbacks.
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The surgical-oncological treatment of pelvic and perineal malignancies is associated with a high complication rate and morbidity for patients. Modern multimodal treatment modalities, such as neoadjuvant radio-chemotherapy for anal or rectal cancer, increase the long-term survival rate while reducing the risk of local recurrence. Simultaneously, the increasing surgical radicality and higher oncological safety with wide resection margins is inevitably associated with larger and, due to radiation, more complex tissue defects in the perineal and sacral parts of the pelvic floor.

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  • Laparoscopic access is a crucial but difficult part of surgery, often leading to complications, with current tools offering limited safety at higher prices.
  • A new prototype using vibroacoustic signals was tested on pig cadavers, successfully detecting 100% of abdominal cavity entries during 193 insertions.
  • This technology improves situational awareness for surgeons, can identify all phases of needle insertion, and doesn't need specialized sensors in the instrument tip, making it compatible with various medical tools.
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