Charting connections: A systematic review of colorectal surgery research networks.

Research in surgery faces intrinsic difficulties such as the lack of reproducibility of surgical operations, self-referring surgeons, decentralized data. Establishing a community of qualified researchers across surgeons is crucial. Clinical networks have been proposed as solutions to many challenges in surgical research, yet their implementation remains uncommon, especially for surgical trialists. The extent of literature produced by networks remains unclear, but fostering such collaborations could enhance the overall quality of surgical research. We conducted review focusing on research networks in colorectal surgery to assess their workload and impact in the literature and identify factors contributing to their durability. Following PRISMA guidelines, we searched for articles published through research networks. Networks were categorized by subspecialty, and specific items were retrieved for further classification. A survey was administered to twenty experts in colorectal surgery or research networking. A total of 2490 manuscripts were screened, and 397 networks identified. Of these, 96 were colorectal networks contributing to 492 publications, with 28 networks having five or more publications. Seventeen networks were affiliated with International or National societies, and only 5 conducted both prospective trials and RCTs. Twenty networks reported national or population-based data, and 26 networks lasted for more than 5 years. Sixteen experts participated in the survey, with an 80 % compliance rate, and 12 of them have been involved in creating a surgical network. The large majority of experts advocate the establishment of guidelines for networks creation in the surgical community.

Risk factors for recurrence and complications after laparoscopic repair of incisional hernia using a double-layered ePTFE/PP mesh: results of a retrospective study.

BACKGROUND: The objective was to analyse, risk factors for recurrence (primary outcome) and complications (secondary outome) after the implantation of a double layer ePTFE (expanded PolytTetraFluoroEthylene) / PP (PolyPropylene) mesh to treat incisional hernias (IH) using the Intraperitoneal Onlay Mesh (IPOM) technique. METHODS: We included all elective laparoscopic IH repairs with intraperitoneal placement of a ePTFE / PP mesh (Relimesh® - Herniamesh S.r.l.) from January 1, 2010 to December 31, 2017 at Humanitas Mater Domini Clinical Institute in Castellanza (Italy) and at the Centre for Minimally Invasive Surgery of Nis (Serbia). Performance was defined as long-term recurrence rate. RESULTS: A total of 284 patients were enrolled. According to the European Hernia Society (EHS) hernias were classified as: W1 (<4 cm) 60.29%, W2 (≥4-10 cm) 35.02% and W3 (≥10 cm) 4.69%; medial 90.85%, lateral 6.69%, both medial and lateral 2.11%. Average follow-up was 48 (11-110) months. The 30-days complication rate was 4.23%. Hernia recurrence rate was 3.36%. Long-term complication rate was 6.34%. At multivariable analysis, an increased risk of short-term complications was associated to chronic obstructive pulmonary disease (COPD) (OR 7.59 [2.23-25.83], P=0.001); an increased risk of long-term complications was associated to diabetes (OR 6.21 [1.80-21.42], P=0.004), an increased risk of recurrence was correlated to COPD (OR 13.40 [1.36-131.9], P=0.026) and hernia defects larger than 6 cm (OR 19.2 [1.12-329.9], P=0.042). CONCLUSIONS: Elective laparoscopic IH repair with a double-layered ePTFE/PP mesh is safe and effective. Compliance with indications and preoperative patients evaluation are essential to improve outcomes.

MRI-Pathology Agreement in Rectal Cancer: Real-World Data from a Prospective Rectal Cancer Registry.

Introduction: Magnetic Resonance Imaging (MRI) is routinely used in preoperative rectal cancer staging. The concordance of MRI staging with final pathologic exam, albeit improved, has not yet reached perfection. The aim of this study is to analyze the agreement between MRI and pathologic exam in patients operated on for mid-low rectal cancer. Material and Method: Patients undergoing neoadjuvant chemoradiation therapy (nCRT) or upfront surgery were analyzed. Between January 2019 to December 2019, 140 patients enrolled in the AIMS Academy rectal cancer registry were analyzed. Sixty-two patients received nCRT and 78 underwent upfront surgery. Results: Overall, the agreement between MRI and pathologic exam on T stage and N stage were 64.7% and 69.2%, respectively. The agreement between MRI and pathologic exam on T stage was 62.7% for patients who did not receive nCRT and 67.4% for patients who received nCRT (p = 0.62). The agreement on N stage was 76.3% for patients who did not receive nCRT and 60.0% for patients who received nCRT (p = 0.075). Conclusions: Real-world data shows MRI is still far from being able to correlate with the pathology findings which raises questions about the accuracy of the real-life decision-making process during cancer boards.

Is BMI a Factor in Compliance to Adjuvant Chemotherapy for Locally Advanced Rectal Cancer?

Background: Compliance to adjuvant chemotherapy (AC) for patients undergoing rectal surgery ranges from 43% to 73.6%. Reasons reported for not initiating or completing AC include onset of postoperative complications, drug toxicity, disease progression and/or patient preferences. Little is known regarding the impact of obesity on the compliance to AC in this setting. Methods: This multicenter, retrospective study analyzed compliance to AC and treatment-related morbidity in 511 patients having undergone surgery with curative intent for rectal cancer in six Italian colorectal centers between January 2013 and December 2017. Results: 70 patients were obese (BMI 30 kg/m2). The proportion of open procedures (22.9% vs. 13.4%) and conversions (14.3% vs. 4.8%) was greater in obese compared to non-obese patients (p 0.001). Median hospital stay was one day longer for obese patients (9 days vs. 10 days, p=0.038) while there was no statistically significant difference in the complication rate, whether overall (58.6% in obese vs. 52.3% in non-obese) or with a Clavien-Dindo score 3 (17.1% vs 10.9%). AC was offered to 49/70 (70%) patients in the obese group and 306/441 (69.4%) in the non-obese group (p=0.43). There was no statistically significant difference in AC compliance: 18.4% and 22.9% did not start AC, while 36.7% and 34.6%, started AC but did not complete the scheduled treatment (p=0.79) in the obese and non-obese group, respectively. Overall, 55% of patients who started AC successfully completed their adjuvant treatment. Conclusions: Obesity did not impact compliance to AC for locally advanced rectal cancer: compliance was poor in obese and non-obese patients with no statistically significant difference between the two groups. Major complication rate was not statistically significantly affected by increased BMI.

Quality of Life After Elective Laparoscopic Sigmoidectomy for Symptomatic Uncomplicated Diverticular Disease.

INTRODUCTION: Symptomatic uncomplicated diverticular disease (SUDD) is characterized by abdominal pain and altered bowel function and may affect quality of life. When symptoms are severe and conservative therapy is ineffective, surgical intervention becomes an option. OBJECTIVE: This study aims to investigate quality of life after elective sigmoidectomy for patients affected by SUDD. MATERIALS AND METHODS: Retrospective multicenter review of consecutive patients affected by SUDD that underwent elective laparoscopic sigmoidectomy from January 2015 to March 2018. SUDD was defined as the presence of diverticula with persistent localized pain and diarrhea or constipation without macroscopic inflammation. Quality of life was investigated using the Gastrointestinal Quality of Life Index questionnaire at baseline, and at 6 and 12 months after surgery. Readmissions, unplanned clinical examination, mesalazine resumption, and emergency department visit for abdominal symptoms were recorded. RESULTS: Fifty-two patients were included in the analysis. Gastrointestinal Quality of Life Index score at 6 months from surgery did not statistically differ from baseline (96±10.2 vs. 89±11.2; P>0.05), while patients reported a better quality of life at 12 months after surgery (109±8.6; P<0.05). Within the first year of follow-up, 3 patients (5.8%) were readmitted for acute enteritis, 8 patients (15.4%) had emergency room access for abdominal pain, and 8 patients had unplanned outpatients' medical examinations for referred lower abdominal pain and bowel changes. Mesalazine was resumed in 17.3% of patients. CONCLUSION: Elective laparoscopic sigmoidectomy for SUDD is safe and effective in improving quality of life, although in some cases symptoms may persist.

High Versus Low Ligation of the Inferior Mesenteric Artery During Rectal Resection for Cancer: Oncological Outcomes After Three Years of Follow-Up From the HIGHLOW Trial.

Objectives: To determine the disease-free survival (DFS), disease-specific survival (DSS), and recurrence in patients who underwent laparoscopic low anterior rectal resection with total mesorectal excision (TME) with either high or low ligation of the inferior mesenteric artery (IMA). Background: The level of IMA ligation during anterior rectal resection with TME is still a matter of debate, especially in terms of oncological adequacy. Methods: Between June 2014 and December 2016, patients scheduled to undergo elective laparoscopic low anterior resection (LAR) and TME in 6 Italian nonacademic hospitals were randomized into 2 groups in the HIGHLOW Trial (ClinicalTrials.gov Identifier: NCT02153801) according to the level of IMA ligation: high ligation (HL) versus low ligation (LL). DFS, DSS, and recurrence were inquired. Recurrence was determined at 3, 6, 9, and 12 months and every 6 months thereafter. Patients and tumor characteristics as well as surgical outcomes were analyzed to identify risk factors for recurrence. Results: One hundred ninety-six patients from the HIGHLOW trial were analyzed. Median follow-up for DFS was 40.6 (interquartile range [IQR], 6-64.7) and 40 (IQR, 7.6-67.8), while median follow-up for DSS was 41.2 (IQR, 10.7-64.7) and 42.7 (IQR, 6-67.6) in the HL and LL groups, respectively. The 3-year DFS rate of HL and LL patients was 82.2% and 82.1% (P = 0.874), respectively. The 3-year DSS for HL and LL patients was 92.1% and 93.4% (P = 0.897), respectively. There was no statistically significant difference in the local recurrence rate (2% HL vs 2.1% LL), in the regional recurrence rate (3% HL vs 2.1% LL), and in the distant recurrence rate (12.9% HL vs 13.7% LL). Multivariate analysis found conversion to open surgery (hazard ratio [HR], 3.68; P = 0.001) and higher stage of disease (HR, 7.73; P < 0.001) to be significant determinant for DFS. Conclusions: The level of inferior mesenteric artery ligation during LAR and TME for rectal cancer does not affect DFS, DSS, and recurrence.

Symptomatic Uncomplicated Diverticular Disease and Incidence of Unexpected Abscess during Sigmoidectomy: A Multicenter Prospective Observational Study.

BACKGROUND: Symptomatic uncomplicated diverticular disease can affect patients' everyday routine. Considerable efforts have been made to identify clinical features that correlate to the severity of the disease. Unexpected intraoperative abscesses are reported in large retrospective series, showing how uncomplicated symptoms and presentations can underlie a complicated disease. The aim of this study was to investigate the incidence of pericolic or intramural abscess in patients undergoing elective sigmoidectomy for symptomatic uncomplicated diverticular disease and see if chronic symptoms correlate to the presence of an abscess. METHODS: Between January 2016 and June 2018, we prospectively collected data of patients who were given indication to elective sigmoidectomy for symptomatic uncomplicated diverticular disease. Patients were divided into 3 groups: acute resolving, smoldering, and atypical according to a previously described classification of uncomplicated diverticular disease. RESULTS: One hundred fifty-eight consecutive patients were enrolled in the study. The median age was 63 years (22- 88), and the mean body mass index was 26 (±7) kg/m2. There were 114 patients in the acute resolving group, 36 in the smoldering group, and 8 in the atypical group. An unexpected abscess was reported in 75 patients (47.5%) during surgery or pathological examination. The incidence of -abscess was greater for patient in the smoldering group (p = 0.0243). CONCLUSION: Our series of patients affected by symptomatic uncomplicated diverticular disease showed an incidence of unexpected pericolic or intramural abscess of 47.5%. Patients affected by smoldering diverticular disease presented a greater abscess rate.

Creation of a rectal cancer registry in Italy by the Advanced International Mini-Invasive Surgery (AIMS) academy clinical research network.

Background: The management of rectal cancer is multimodal and involves a multidisciplinary team of cancer specialists with expertise in medical oncology, surgical oncology, radiation oncology and radiology. It is crucial for highly specialized centers to collaborate via networks that aim to maintain uniformity in every aspect of treatment and rigorously gather patients' data, from the first clinical evaluation to the last follow-up visit. The Advanced International Mini-Invasive Surgery (AIMS) academy clinical research network aims to create a rectal cancer registry. This will prospectively collect the data of patients operated on for non-metastatic rectal cancer in high volume colorectal surgical units through a well design pre-fashioned database for non-metastatic rectal cancer, in order to take all multidisciplinary aspects into consideration. Methods/Design: The protocol describes a multicenter prospective observational cohort study, investigating demographics, frailty, cancer-related features, surgical and radiological parameters, and oncological outcomes among patients with non-metastatic rectal cancer who are candidates for surgery with curative intent. Patients enrolled in the present registry will be followed up for 5 years after surgery. Discussion: Standardization and centralization of data collection for neoplastic diseases is a virtuous process for patient care. The creation of a register will allow the control of the quality of treatments provided and permit prospective and retrospective studies to be carried out on complete and reliable high quality data. Establishing data collection in a prospective and systematic fashion is the only possibility to preserve the enormous resource that each patient represents.

Compliance to Adjuvant Chemotherapy of Patients Who Underwent Surgery for Rectal Cancer: Report from a Multi-institutional Research Network.

INTRODUCTION: Adjuvant chemotherapy for locally advanced rectal cancer is associated with improved overall survival. However, recent evidence from randomized trials showed a compliance rate of 43 to 73%, which may affect efficacy. The aim of this multicenter retrospective analysis was to investigate the compliance rate to adjuvant treatment for patients who underwent rectal surgery for cancer. METHODS: Patients who underwent surgery with curative intent for rectal cancer in six Italian colorectal centers between January 2013 and December 2017 were retrospectively reviewed. Exclusion criteria were age less than 18 years, palliative or emergency surgery, and stage IV disease. Parameters of interest were patients' characteristics, preoperative tumor stage, neo-adjuvant chemoradiation therapy, intra-operative and postoperative outcomes. Although the participating centers referred to the same treatment guidelines for treatment, the chemotherapy regiment was not standardized across the institutions. Reasons for not starting adjuvant chemotherapy when indicated, interruption, and modification of drug regimen were collected to investigate compliance. RESULTS: A total of 572 patients were included in the analysis. Two hundred and fifty-two (44.1%) patients received neo-adjuvant chemoradiation therapy. All patients underwent high anterior rectal resection, low anterior rectal resection, or Miles' procedure. Of 399 patients with an indication to adjuvant chemotherapy, 176 (44.1%) completed the treatment as planned. Compliance for patients who started chemotherapy was 56% (95% CI 50.4-61.6%). Sixty-six patients interrupted the treatment, 76 patients significantly reduced the drug dose, and 41 patients had to switch to other therapeutic regimens. CONCLUSIONS: The present multicenter investigation reports a low compliance rate to adjuvant chemotherapy after rectal resection for cancer. Multidisciplinary teams should focus on future effort to improve compliance for these patients.

Laparoscopic Approach to Large Bowel Neoplastic Obstruction After Self-Expandable-Metal-Stent (SEMS) Placement.

Endoscopic self-expandable metal stent (SEMS) placement as a bridge to surgery in large bowel neoplastic obstruction is an alternative to emergency surgery for the obstructive colorectal neoplasms. This study aims to analyze postoperative and long-term outcomes in a series of patients who underwent laparoscopic colorectal resection after SEMS placement. The analysis, after the stratification based on the time elapsed between the onset of the occlusive symptoms and the SEMS positioning, revealed an interesting result, with lower mortality for patients who underwent the procedure within 24 hours of hospitalization (P=0.0159). This trend may indicate the need to reduce the endoscopic time schedules as much as possible, even if an emergency procedure is needed. The laparoscopic approach, after stent placement as bridge therapy, can be a safe alternative to emergency surgery, if the procedure is precociously applied.

New endoscopic procedures for diabetes mellitus type 2 and obesity treatment.

BACKGROUND: Obesity continues to be a growing epidemic worldwide. Obese patients have severe comorbidities that make risky and technically demanding the execution of bariatric surgery from both surgical and anesthetic point of view; therefore, the focus of bariatric surgeons is increasingly moving towards minimally invasive, endoscopic techniques. METHODS: The present review presents and discusses recent endoscopic techniques employed in obesity treatment, their features and results. RESULTS: Endoscopic treatment can be primary or revisional; we can mainly divide the endoscopic devices into five categories: space-occupying devices, restrictive procedures, bypass liner, aspiration therapy and endoscopic revision of gastric bypass for dilated gastric pouch. CONCLUSIONS: Endoscopic treatments for obesity are promising techniques for selected patients but each procedure should be tailored on the patient in a multimodal approach.

Evaluation of the learning curve for thulium laser enucleation of the prostate with the aid of a simulator tool but without tutoring: comparison of two surgeons with different levels of endoscopic experience.

BACKGROUND: The aim of this study was to determine the learning curve for thulium laser enucleation of the prostate (ThuLEP) for two surgeons with different levels of urological endoscopic experience. METHODS: From June 2012 to August 2013, ThuLEP was performed on 100 patients in our institution. We present the results of a prospective evaluation during which we analyzed data related to the learning curves for two surgeons of different levels of experience. RESULTS: The prostatic adenoma volumes ranged from 30 to 130 mL (average 61.2 mL). Surgeons A and B performed 48 and 52 operations, respectively. Six months after surgery, all patients were evaluated with the International Prostate Symptom Score questionnaire, uroflowmetry, and prostate-specific antigen test. Introduced in 2010, ThuLEP consists of blunt enucleation of the prostatic apex and lobes using the sheath of the resectoscope. This maneuver allows clearer visualization of the enucleation plane and precise identification of the prostatic capsule. These conditions permit total resection of the prostatic adenoma and coagulation of small penetrating vessels, thereby reducing the laser emission time. Most of the complications in this series were encountered during morcellation, which in some cases was performed under poor vision because of venous bleeding due to surgical perforation of the capsule during enucleation. CONCLUSIONS: Based on this analysis, we concluded that it is feasible for laser-naive urologists with endoscopic experience to learn to perform ThuLEP without tutoring. Those statements still require further validation in larger multicentric study cohort by several surgeon. The main novelty during the learning process was the use of a simulator that faithfully reproduced all of the surgical steps in prostates of various shapes and volumes.