Robot-assisted versus conventional laparoscopic surgery for rectal cancer.

OBJECTIVES: This is a protocol for a Cochrane Review (intervention). The objectives are as follows: To assess the benefits and harms of robot-assisted surgery for rectal cancer resection.

Adherence to fast track measures in colorectal surgery-a survey among German and Austrian surgeons.

PURPOSE: The effectiveness of modern perioperative treatment concepts has been demonstrated in several studies and meta-analyses. Despite good evidence, limited implementation of the fast track (FT) concept is still a widespread concern. To assess the status quo in Austrian and German hospitals, a survey on the implementation of FT measures was conducted among members of the German Society of General and Visceralsurgery (DGAV), the German Society of Coloproctology (DGK) and the Austrian Society of Surgery (OEGCH) to analyze where there is potential for improvement. METHODS: Twenty questions on perioperative care of colorectal surgery patients were sent to the members of the DGAV, DGK and OEGCH using the online survey tool SurveyMonkey®. Descriptive data analysis was performed using Microsoft Excel. RESULTS: While some of the FT measures have already been routinely adopted in clinical practice (e.g. minimally invasive surgical approach, early mobilization and diet buildup), for other components there are discrepancies between current recommendations and present implementation (e.g. the use of local nerve blocks to provide opioid-sparing analgesia or the use of abdominal drains). CONCLUSION: The implementation of the FT concept in Austria and Germany is still in need of improvement. Particularly regarding the use of abdominal drains and postoperative analgesia, there is a tendency to stick to traditional structures. To overcome the issues with FT implementation, the development of an evidence-based S3 guideline for perioperative care, followed by the founding of a surgical working group to conduct a structured education and certification process, may lead to significant improvements in perioperative patient care.

Preoperative combined mechanical and oral antibiotic bowel preparation for preventing complications in elective colorectal surgery.

BACKGROUND: The success of elective colorectal surgery is mainly influenced by the surgical procedure and postoperative complications. The most serious complications include anastomotic leakages and surgical site infections (SSI)s, which can lead to prolonged recovery with impaired long-term health.  Compared with other abdominal procedures, colorectal resections have an increased risk of adverse events due to the physiological bacterial colonisation of the large bowel. Preoperative bowel preparation is used to remove faeces from the bowel lumen and reduce bacterial colonisation. This bowel preparation can be performed mechanically and/or with oral antibiotics. While mechanical bowel preparation alone is not beneficial, the benefits and harms of combined mechanical and oral antibiotic bowel preparation is still unclear. OBJECTIVES: To assess the evidence for the use of combined mechanical and oral antibiotic bowel preparation for preventing complications in elective colorectal surgery. SEARCH METHODS: We searched MEDLINE, Embase, CENTRAL and trial registries on 15 December 2021. In addition, we searched reference lists and contacted colorectal surgery organisations. SELECTION CRITERIA: We included randomised controlled trials (RCTs) of adult participants undergoing elective colorectal surgery comparing combined mechanical and oral antibiotic bowel preparation (MBP+oAB) with either MBP alone, oAB alone, or no bowel preparation (nBP). We excluded studies in which no perioperative intravenous antibiotic prophylaxis was given. DATA COLLECTION AND ANALYSIS: We used standard methodological procedures as recommended by Cochrane. Pooled results were reported as mean difference (MD) or risk ratio (RR) and 95 % confidence intervals (CIs) using the Mantel-Haenszel method. The certainty of the evidence was assessed with GRADE. MAIN RESULTS: We included 21 RCTs analysing 5264 participants who underwent elective colorectal surgery. None of the included studies had a high risk of bias, but two-thirds of the included studies raised some concerns. This was mainly due to the lack of a predefined analysis plan or missing information about the randomisation process. Most included studies investigated both colon and rectal resections due to malignant and benign surgical indications. For MBP as well as oAB, the included studies used different regimens in terms of agent(s), dosage and timing.  Data for all predefined outcomes could be extracted from the included studies. However, only four studies reported on side effects of bowel preparation, and none recorded the occurrence of adverse effects such as dehydration, electrolyte imbalances or the need to discontinue the intervention due to side effects. Seventeen trials compared MBP+oAB with sole MBP. The incidence of SSI could be reduced through MBP+oAB by 44% (RR 0.56, 95% CI 0.42 to 0.74; 3917 participants from 16 studies; moderate-certainty evidence) and the risk of anastomotic leakage could be reduced by 40% (RR 0.60, 95% CI 0.36 to 0.99; 2356 participants from 10 studies; moderate-certainty evidence). No difference between the two comparison groups was found with regard to mortality (RR 0.87, 95% CI 0.27 to 2.82; 639 participants from 3 studies; moderate-certainty evidence), the incidence of postoperative ileus (RR 0.89, 95% CI 0.59 to 1.32; 2013 participants from 6 studies, low-certainty of evidence) and length of hospital stay (MD -0.19, 95% CI -1.81 to 1.44; 621 participants from 3 studies; moderate-certainty evidence). Three trials compared MBP+oAB with sole oAB. No difference was demonstrated between the two treatment alternatives in terms of SSI (RR 0.87, 95% CI 0.34 to 2.21; 960 participants from 3 studies; very low-certainty evidence), anastomotic leakage (RR 0.84, 95% CI 0.21 to 3.45; 960 participants from 3 studies; low-certainty evidence), mortality (RR 1.02, 95% CI 0.30 to 3.50; 709 participants from 2 studies; low-certainty evidence), incidence of postoperative ileus (RR 1.25, 95% CI 0.68 to 2.33; 709 participants from 2 studies; low-certainty evidence) or length of hospital stay (MD 0.1 respectively 0.2, 95% CI -0.68 to 1.08; data from 2 studies; moderate-certainty evidence). One trial (396 participants) compared MBP+oAB versus nBP. The evidence is uncertain about the effect of MBP+oAB on the incidence of SSI as well as mortality (RR 0.63, 95% CI 0.33 to 1.23 respectively RR 0.20, 95% CI 0.01 to 4.22; low-certainty evidence), while no effect on the risk of anastomotic leakages (RR 0.89, 95% CI 0.33 to 2.42; low-certainty evidence), the incidence of postoperative ileus (RR 1.18, 95% CI 0.77 to 1.81; low-certainty evidence) or the length of hospital stay (MD 0.1, 95% CI -0.8 to 1; low-certainty evidence) could be demonstrated. AUTHORS' CONCLUSIONS: Based on moderate-certainty evidence, our results suggest that MBP+oAB is probably more effective than MBP alone in preventing postoperative complications. In particular, with respect to our primary outcomes, SSI and anastomotic leakage, a lower incidence was demonstrated using MBP+oAB. Whether oAB alone is actually equivalent to MBP+oAB, or leads to a reduction or increase in the risk of postoperative complications, cannot be clarified in light of the low- to very low-certainty evidence. Similarly, it remains unclear whether omitting preoperative bowel preparation leads to an increase in the risk of postoperative complications due to limited evidence. Additional RCTs, particularly on the comparisons of MBP+oAB versus oAB alone or nBP, are needed to assess the impact of oAB alone or nBP compared with MBP+oAB on postoperative complications and to improve confidence in the estimated effect. In addition, RCTs focusing on subgroups (e.g. in relation to type and location of colon resections) or reporting side effects of the intervention are needed to determine the most effective approach of preoperative bowel preparation.

Transcutaneous vagal nerve simulation to reduce a systemic inflammatory response syndrome and the associated intestinal failure: study protocol of a prospective, two-armed, sham-controlled, double-blinded trial in healthy subjects (the NeuroSIRS-Study).

PURPOSE: Surgery initiates pro-inflammatory mediator cascades leading to a variably pronounced sterile inflammation (SIRS). SIRS is associated with intestinal paralysis and breakdown of intestinal barrier and might result in abdominal sepsis. Technological progress led to the development of a neurostimulator for transcutaneous auricular vagal nerve stimulation (taVNS), which is associated with a decline in inflammatory parameters and peristalsis improvement in rodents and healthy subjects via activation of the cholinergic anti-inflammatory pathway. Therefore, taVNS might be a strategy for SIRS prophylaxis. METHODS: The NeuroSIRS-Study is a prospective, randomized two-armed, sham-controlled, double-blind clinical trial. The study is registered at DRKS00016892 (09.07.2020). A controlled endotoxemia is used as a SIRS-mimicking model. 2 ng/kg bodyweight lipopolysaccharide (LPS) will be administered after taVNS or sham stimulation. The primary objective is a reduction of clinical symptoms of SIRS after taVNS compared to sham stimulation. Effects of taVNS on release of inflammatory cytokines, intestinal function, and vital parameters will be analyzed. DISCUSSION: TaVNS is well-tolerated, with little to no side effects. Despite not fully mimicking postoperative inflammation, LPS challenge is the most used experimental tool to imitate SIRS and offers standardization and reproducibility. The restriction to healthy male volunteers exerts a certain bias limiting generalizability to the surgical population. Still, this pilot study aims to give first insights into taVNS as a prophylactic treatment in postoperative inflammation to pave the way for further clinical trials in patients at risk for SIRS. This would have major implications for future therapeutic approaches.

Surgical treatment of mechanical bowel obstruction: characteristics and outcomes of geriatric patients compared to a younger cohort.

PURPOSE: Mechanical bowel obstruction (MBO) is one of the most common indications for emergency surgery. Recent research justifies the method of attempting 3-5 days of nonoperative treatment before surgery. However, little is known about specific characteristics of geriatric patients undergoing surgery compared to a younger cohort. We aimed to analyze patients with MBO that required surgery, depending on their age, to identify potential targets for use in the reduction in complications and mortality in the elderly. METHODS: Thirty-day and in-hospital mortality were determined as primary outcome. We retrospectively identified all patients who underwent surgery for MBO at the University Hospital of Bonn between 2009 and 2019 and divided them into non-geriatric (40-74 years, n = 224) and geriatric (≥ 75 years, n = 88) patients, using the chi-squared-test and Mann-Whitney U test for statistical analysis. RESULTS: We found that geriatric patients had higher 30-day and in-hospital mortality rates than non-geriatric patients. As secondary outcome, we found that they experienced a longer length of stay (LOS) and higher complication rates than non-geriatric patients. Geriatric patients who suffered from large bowel obstruction (LBO) had a higher rate of bowel resection, stoma creation, and a higher 30-day mortality rate. The time from admission to surgery was not shown to be crucial for the outcome of (geriatric) patients. CONCLUSION: Geriatric patients suffering from mechanical bowel obstruction that had to undergo surgery had higher mortality and morbidity than non-geriatric patients. Especially in regard to geriatric patients, clinicians should treat patients in a risk-adapted rather than time-adapted manner, and conditions should be optimized before surgery.

TIPS for the management of stomal variceal bleeding due to cirrhotic and non-cirrhotic portal hypertension.

BACKGROUND: Portal hypertension (PH) is associated with the development of esophageal or gastric varices, which can cause bleedings with high mortality. Varices can also manifest at sites of stomata. These parastomal varices can cause recurrent variceal bleedings (VB) despite local therapies. We present a case series of parastomal VB due to PH that were managed with implantation of transjugular intrahepatic portosystemic shunt (TIPS). METHODS: We retrospectively included all patients (pt) from 2 tertiary medical centers with parastomal VB between January 2014 and February 2020 who underwent the TIPS procedure. RESULTS: Nine pt were included. Seven pt had liver cirrhosis, mostly alcohol-related. Two pt had non-cirrhotic PH due to porto-sinusoidal vascular disease (PSD). Four pt had a colostomy, 1 an ileostomy, and 4 an ileal conduit. Malignancy was the leading cause of stoma surgery. All 9 pt suffered from recurrent parastomal VB despite non-selective beta-blocker and/or local therapy (e.g., compression, coagulation, suture ligation, or surgical stoma revision). All pt received TIPS implantation. In 7 pt, TIPS implantation led to sustainable hemostasis. Two pt suffered a bleeding relapse that was attributable to TIPS dysfunction. TIPS revision with coil embolization of the varices terminated the VB sustainably in both pt. CONCLUSIONS: In pt presenting with recurrent stomal bleedings, parastomal varices as a rare complication of PH must be taken into consideration as an underlying cause. In our case series, we managed to sustainably cease parastomal VB by TIPS implantation with or without coil embolization of the ectopic varices.

The Significance of Visceral Protection in Preventing Enteroatmospheric Fistulae During Open Abdomen Treatment in Patients With Secondary Peritonitis: A Propensity Score-matched Case-control Analysis.

OBJECTIVE: To evaluate the influence of a visceral protective layer (VPL) on the formation of enteroatmospheric fistulae (EAF) in open abdomen treatment (OAT) for peritonitis. BACKGROUND: EAF formation is a severe complication of OAT. Despite the widespread use of OAT, there are no robust evidence-based recommendations for preventing EAF. METHODS: A total of 120 peritonitis patients with secondary peritonitis as a result of a perforation of a hollow viscus or anastomotic insufficiency who had undergone OAT were included, and 14 clinical parameters were recorded in prospective OAT databases at 2 tertiary referral centers. For this analysis, patients with a VPL were assigned to the treatment group and those without a VPL to the control group. Propensity Score (PS) matching was performed. Known risk factors in OAT such as malignant disease, mortality, emergency operation, OAT duration, and fascial closure were matching variables. The influence of VPL on EAF formation was statistically evaluated using logistic regression analysis. RESULTS: With 34 patients in each group, no notable differences were identified with regard to age, sex, underlying disease, mortality, emergency operation, fascial closure, and OAT duration. Overall, a mortality rate of 22.1% for OAT due to peritonitis was observed. Mean OAT duration was approximately 9 days, and secondary fascial closure was achieved in more than two-thirds of all patients. Fascial traction was used in more than 75% of cases. EAF formation was significantly more frequent in the control group (EAF formation: VPL group 2.9% vs control 26.5%; P = 0.00). In the final regression analysis, the use of VPL resulted in a significant reduction in the risk of EAF formation (odds ratio 0.08; 95% confidence interval 0.01-0.71, P = 0.02), which translates to a relative risk reduction of 89.1%. CONCLUSION: VPL effectively prevents EAF formation during OAT in patients with peritonitis. We recommend the consistent use of VPL as part of a standardized OAT treatment algorithm.

State-of-the-art colorectal disease: postoperative ileus.

PURPOSE: Postoperative Ileus (POI) remains an important complication for patients after abdominal surgery with an incidence of 10-27% representing an everyday issue for abdominal surgeons. It accounts for patients' discomfort, increased morbidity, prolonged hospital stays, and a high economic burden. This review outlines the current understanding of POI pathophysiology and focuses on preventive treatments that have proven to be effective or at least show promising effects. METHODS: Pathophysiology and recommendations for POI treatment are summarized on the basis of a selective literature review. RESULTS: While a lot of therapies have been researched over the past decades, many of them failed to prove successful in meta-analyses. To date, there is no evidence-based treatment once POI has manifested. In the era of enhanced recovery after surgery or fast track regimes, a few approaches show a beneficial effect in preventing POI: multimodal, opioid-sparing analgesia with placement of epidural catheters or transverse abdominis plane block; µ-opioid-receptor antagonists; and goal-directed fluid therapy and in general the use of minimally invasive surgery. CONCLUSION: The results of different studies are often contradictory, as a concise definition of POI and reliable surrogate endpoints are still absent. These will be needed to advance POI research and provide clinicians with consistent data to improve the treatment strategies.

Safety and Suitability of the SmartPill® after Abdominal Surgery: Results of the Prospective, Two-Armed, Open-Label PIDuSA Trial.

INTRODUCTION: Postoperative ileus (POI) is a common complication after abdominal surgery. Until today, an evidence-based treatment of prolonged POI is still lacking, which can be attributed to the poor quality of clinical trials. Various different surrogate markers used to define POI severity are considered to be the cause of low-quality trials making it impossible to derive treatment recommendation. The SmartPill®, which is able to record pH values, temperature and pressure after ingestion, could be an ideal tool to measure transit times and peristalsis and therefore analyze POI severity. Unfortunately, the device has no approval for postoperative use due to safety concerns. The primary objective of the study is to determine safety of the SmartPill® in patients undergoing surgery. Secondary objectives were the quality of the recorded data and the suitability of the SmartPill® for analyzing intestinal motility after different surgical procedures. METHODS: The PIDuSA Study is a prospective, 2-arm, open-label trial. At the end of surgery, the SmartPill® was applied to 49 patients undergoing abdominal surgery having a high risk for impaired intestinal motility and 15 patients undergoing extra-abdominal surgery. Patients were visited daily to access safety data of the SmartPill® on the basis of adverse and serious adverse events (AEs/SAEs). Suitability and data quality were investigated by analyzing data completeness and feasibility to determine transit times and peristalsis for all sections of the gastrointestinal tract. RESULTS: In total, 179 AEs and 8 SAEs were recorded throughout the study affecting 42 patients in the abdominal (158 AEs) and 9 patients in the extra-abdominal surgery group (21 AEs, p = 0.061); none of them were device related. Primary capsule failure was observed in 5 patients, ultimately resulting in an impossibility of data analysis in only 3 patients (4.4%). 9% of the recorded data were incomplete due to the patient's incompliance in keeping the receiver close to the body. In 3 patients (4.4%), isolated small bowel transit could not be determined due to pH alterations as a result of prolonged POI. DISCUSSION: Our study demonstrates that the use of the SmartPill® is safe after surgery but requires a reasonable patient compliance to deliver meaningful data. An objective analysis of transit times and peristalsis was possible irrespective of type and site of surgery in over 95% indicating that the SmartPill® has the potential to deliver objective parameters for POI severity in future clinical trials. However, in some patients with prolonged POI, analysis of small bowel transit could be challenging.

[Incidental finding of an intestinally differentiated adenocarcinoma in a tailgut cyst after robotic-assisted resection]. / Zufallsbefund eines intestinal differenzierten Adenokarzinoms in einer Tailgut Zyste nach robotisch-assistierter Resektion.

Due to pelvic symptoms, a diagnostic sectional imaging was initiated in a 52-year-old female patient. This revealed a cystic, retrorectal mass, suspected to be a tailgut cyst. Due to the symptoms and the unclear dignity after several frustrating endosonographic punctures, a robotic-assisted resection of the cystic Tumor was performed after careful interdisciplinary consultation.The histological examination confirmed the diagnosis of a tailgut cyst but also revealed parts of an intestinally differentiated adenocarcinoma.Due to the unclear metastatic behaviour, robotic-assisted low anterior resection with total mesorectal excision was performed as oncological resection, similar to rectal carcinomas. No residuals or lymph node metastases were detectable in the histological examination, so that follow- up monitoring was recommended.Retrorectal tumours are an extremely rare entity, worldwide only 28 cases of an intestinally differentiated carcinoma in a tailgut cyst have been described so far. Since there are no clear recommendations in the literature regarding the diagnostic or therapeutic procedure, we would like to discuss a possible algorithm in case of a proven retrorectal mass in our case study.

[Background, Necessity and Methodology of the S3 Guideline "Perioperative Management of Gastrointestinal Tumours (POMGAT)"]. / Hintergrund, Notwendigkeit und Methodik der S3-Leitlinie "Perioperatives Management bei gastrointestinalen Tumoren (POMGAT)".

Malignancies are among the most common diseases, especially in old age, and are responsible for 25% of all deaths in Germany. Especially carcinomas of the gastrointestinal tract can be cured in most cases only through extensive surgery with significant morbidity. About 25 years ago, the multimodal, perioperative Fast Track (FT) concept for reducing postoperative complications was introduced and additional elements were added in the following years. Meanwhile, there is growing evidence that adherence to the key elements of more than 70% leads to reduction in postoperative adverse events as well as a shorter hospital stay and could be associated with an improved oncological outcome. Despite the high level of awareness and the proven advantages of the FT concept, the implementation and maintenance of the measures is difficult and results in an adherence of only 20 - 40%. There are many reasons for this: In addition to a lack of interdisciplinary and interprofessional cooperation and the time consuming and extended logistical efforts, limited human resources are often listed as one of the main causes. We took these aspects as an opportunity and started to develop a S3 guideline for perioperative treatment to accelerate the recovery of patients with gastrointestinal malignancies. By creating a consensus- and evidence-based, multidisciplinary guideline, many of the problems listed above could probably be solved by optimising and standardising interdisciplinary care, which is particularly important in a setting with many different disciplines and their competing interests. Furthermore, the standardisation of the perioperative procedures will reduce the time and logistical effort. The presentation of the evidence allows increased transparency and justifies the additional personnel expenditure on hospital medicine and health insurance companies. In addition, the evidence-based quality indicators generated during the development of the guideline make it possible to include perioperative standards in certification systems and thus to measure and check the quality of perioperative care.

[Evaluation of the Effectiveness of a Standard Operating Procedure (SOP) for the Perioperative Management of Colorectal Surgery]. / Evaluation der Effektivität einer Standard Operating Procedure (SOP) zur perioperativen Therapie bei kolorektalen Operationen.

INTRODUCTION: In recent years, perioperative care of patients after colorectal surgery has been increasingly standardised according to the fast-track concept and is accepted as a structured method of care to reduce perioperative complications. Indeed, initial studies have indicated that there is a long-term favourable effect on the oncological outcome, if the adherence to the individual measures is at least 70%. Even though there is unambiguous evidence for the efficacy of the modern perioperative treatment concept, it is often difficult to comply with the protocol during normal clinical work, particularly in Germany. The objective of this study was to record the rate of compliance before and after the introduction of the SOP and to evaluate its efficacy. METHODS: We performed a retrospective analysis of the patient data after all elective colorectal surgery in the Bonn University Hospital from 2017 to 2020. 153 patients were operated on before the implementation of the SOP in January 2019 (group I); the remaining 153 patients were operated on after the implementation of the SOP and received appropriate care (group II). Compliance to the protocol was analysed for both the individual key interventions and the overall concept. RESULTS: There was significant improvement in the compliance for both the individual measures (prehabilitation group I: 5.9%, group II: 42.5%, p < 0.001; preparation of the intestine I: 16.5%, II: 73.9%, p < 0.001; intraoperative volume management I: 14,00 ml/kg BW/h, II: 9.12 ml/kg BW/h, p < 0.001, BW: body weight; minimally invasive surgical technique I: 53.6%, II: 73.9%, p < 0.001; etc.) and for the overall perioperative treatment concept (I: 39%, II: 54%, p = 0.02). However, we fell far short of compliance of at least 70%. Nevertheless, patient autonomy was achieved earlier after introduction of the SOP (I: day 15, II: day 9, p < 0.001) and the postoperative hospital stay was shortened (I: 14 [6 - 99] days, II 11 [4 - 64] days; p = 0.007). CONCLUSION: Although the implementation of the SOP led to significant improvements, further optimisation is required to attain the recommended protocol compliance of 70%. Measures within the hospital could include foundation of an interdisciplinary fast-track team and a specialised nurse as the connecting link between the patients, nursing and physicians. On the other hand, implementation throughout Germany can only be achieved by more influential actions. One possible support would be the S3 guideline on perioperative management of gastrointestinal tumours, which is under development. This could, for example, be used to support argumentation with funding providers.

HPV-associated anal lesions in HIV+ patients: long-term results regarding quality of life.

PURPOSE: HIV infection and concomitant HPV-associated anal lesions may significantly impact on patients' quality of life (QoL), as they are predicted to have negative effects on health, psyche, and sexuality. MATERIAL AND METHODS: Fifty-two HIV+ patients with HPV-associated anal lesions were enrolled in a survey approach after undergoing routine proctologic assessment and therapy for HPV-associated anal lesions if indicated over a time span of 11 years (11/2004-11/2015). Therapy consisted of surgical ablation and topic treatment. QoL was analyzed using the SF-36 and the CECA questionnaires. RESULTS: Fifty-two of 67 patients (77.6%) were successfully contacted and 29/52 provided full information. The mean age was 43.8 ± 12.8 years. The median follow-up from treatment to answering of the questionnaire was 34 months. Twenty-one percent (6/29) of the patients reported suffering from recurrence of condyloma acuminata, three patients from anal dysplasia (10.3%). In the SF-36, HIV+ patients did not rate their QoL as significantly different over all items after successful treatment of HPV-associated anal lesions. In the CECA questionnaire, patients with persisting HPV-associated anal lesions reported significantly higher emotional stress levels and disturbance of everyday life compared to patients who had successful treatment (71.9/100 ± 18.7 vs. 40.00/100 ± 27.4, p = 0.004). Importantly, the sexuality of patients with anal lesions was significantly impaired (59.8/100 ± 30.8 vs. 27.5/100 ± 12.2, p = 0.032). CONCLUSION: HPV-associated anal lesions impact significantly negative on QoL in HIV+ patients. Successful treatment of HPV-associated anal lesions in HIV+ patients improved QoL. Specific questionnaires, such as CECA, seem to be more adequate than the SF-36 in this setting.

[The Impact of Supra- and Infracolic Reconstruction on Delayed Gastric Emptying Following Pancreatoduodenectomy]. / Varianten der retrokolischen Rekonstruktion nach partieller Pankreatoduodenektomie und deren Einfluss auf die Magenentleerung ­ infra- oder suprakolisch.

BACKGROUND: Delayed gastric emptying (DGE) is the most frequent complication following pancreatoduodenectomy. While antecolic and retrocolic reconstruction does not influence the occurrence of DGE, infracolic reconstruction might alleviate DGE due to the vertical position of the distal stomach compared to supracolic reconstruction. Supra- and infracolic reconstruction have not yet been compared. PATIENTS: 138 patients underwent pylorus-preserving pancreatoduodenectomy with retrocolic reconstruction at our department between 2011 and 2017. Of these, 105 were reconstructed with supracolic duodenoenterostomy and 33 with infracolic duodenoenterostomy. Patients were analysed with respect to demographic factors, diagnosis, pre-existing conditions, intraoperative characteristics, hospital stay and morbidity and mortality with special emphasis on DGE. All complications were classified according to the definitions of the International Study Group on Pancreatic Surgery. RESULTS: The two groups were comparable with respect to diagnosis, medical history, intraoperative characteristics, morbidity and mortality. DGE was equally distributed between supra- and infracolic reconstruction (DGE stage A/B/C25/14/10 vs. 12/5/2, p = 0.274). With DGE, intensive care unit stay (p = 0.007) and hospital stay (p = 0.001) are significantly delayed. Risk factor analysis showed that pre-existing diabetes (p = 0.047) and major complications (Clavien stage III - V, p = 0.048) are risk factors for DGE, while the use of somatostain-analogues seems to have a protective effect (p = 0.021). CONCLUSION: Supra- or infracolic reconstruction does not influence the frequency of DGE following pancreatoduodenectomy. When DGE occurs, hospital stay is delayed. Somatostatin analogues may act prophylactically on DGE.

[Outcomes after Prophylactic Total Gastrectomy for Hereditary Diffuse Gastric Cancer]. / Ergebnisse nach prophylaktischer totaler Gastrektomie bei erblichem diffusem Magenkrebs.

INTRODUCTION: Prophylactic total gastrectomy is the treatment of choice in patients with germline mutation in the CDH1 gene and therefore high risk for hereditary diffuse gastric cancer (HDGC). Minimally invasive techniques have been established in recent years for treatment of gastric cancer. METHODS: We report findings with 12 patients with proven CDH1 mutation who underwent multidisciplinary treatment between 2013 and 3/2018 in our centre for hereditary tumour diseases, followed by prophylactic total gastrectomy in our department. Data were collected in a prospective hereditary tumour database. RESULTS: Open prophylactic total gastrectomy was performed in 5 patients (between 2013 and 2015) and minimally invasive prospective gastrectomy in 7 patients (between 2015 and 2018). The median age of all patients (7 women and 5 men) was 42 (range: 19 - 60) years. The mean operation time was 291 ± 72 minutes (open: 269 ± 70; minimally invasive: 307 ± 75). Perioperative 60-day mortality and anastomotic leakage rate were 0%. In 3 patients, postoperative complications occurred (according to the Clavien-Dindo classification: one each of grades II, IIIa and IVb, respectively), and therefore 25% morbidity. The average postoperative hospital stay was 14.5 ± 6.2 days (open: 16.2 ± 7.9; minimally invasive: 13.3 ± 5.0). In 10 of 12 patients (83%), foci of intramucosal signet ring cell carcinomas were found in the gastric specimen, in 9 patients with multifocal dissemination. There were no cases with advanced carcinomas (≥ pT1b) or lymph node metastases. CONCLUSION: Patients with suspected high risk for hereditary diffuse gastric cancer should be cared for in a multidisciplinary centre for hereditary tumour diseases. Laparoscopic total gastrectomy is a safe and feasible risk-reducing procedure for patients with CDH1 germline mutation. Therefore, in the absence of contraindications and with available surgical expertise, the minimally invasive operation should be the standard procedure for these patients.

[Current recommendations for surveillance, risk reduction and therapy in Lynch syndrome patients]. / Empfehlungen zur Früherkennung, Risikoreduktion, Überwachung und Therapie bei Patienten mit Lynch-Syndrom.

INTRODUCTION: Lynch syndrome (LS) is the most common hereditary colorectal cancer syndrome and accounts for ~3 % of all CRCs. This autosomal dominant disorder is caused by germline mutations in DNA mismatch repair genes (MLH1, MSH2, MSH6, PMS2, and EPCAM). One in 300 individuals of the general population are considered to be mutation carriers (300 000 individuals/Germany). Mutation carriers are at a high CRC risk of 15-46 % till the age of 75 years. LS also includes a variety of extracolonic malignancies such as endometrial, small bowel, gastric, urothelial, and other cancers. METHODS: The German Consortium for Familial Intestinal Cancer consists of 14 university centers in Germany. The aim of the consortium is to develop and evaluate surveillance programs and to further translate the results in clinical care. We have revisited and updated the clinical management guidelines for LS patients in Germany. RESULTS: A surveillance colonoscopy should be performed every 12-24 months starting at the age of 25 years. At diagnosis of first colorectal cancer, an oncological resection is advised, an extended resection (colectomy with ileorectal anastomosis) has to be discussed with the patient. The lifetime risk for gastric cancer is 0.2-13 %. Gastric cancers detected during surveillance have a lower tumor stage compared to symptom-driven detection. The lifetime risk for small bowel cancer is 4-8 %. About half of small bowel cancer is located in the duodenum and occurs before the age of 35 years in 10 % of all cases. Accordingly, patients are advised to undergo an esophagogastroduodenoscopy every 12-36 months starting by the age of 25 years. CONCLUSION: LS colonic and extracolonic clinical management, surveillance and therapy are complex and several aspects remain unclear. In the future, surveillance and clinical management need to be more tailored to gene and gender. Future prospective trials are needed.

[Treatment of HPV-associated Anal Lesions in HIV-positive Patients - Comparison of Surgical Treatment and Topical Therapy with Imiquimod]. / Behandlung HPV-assoziierter analer Läsionen bei HIV-positiven Patienten ­ chirurgische Abtragung vs. topische Therapie mit Imiquimod.

OBJECTIVES: In HIV+-patients, routine proctological assessment is warranted due to the high incidence of human papilloma virus (HPV) infection-related anogenital lesions, such as Condylomata acuminata (C. ac.), anal intraepithelial dysplasia (AIN) and anal cancer. For C. ac. and AIN, surgical resection and topical therapy with imiquimod have been discussed as treatment options. BACKGROUND: In this study, we contrasted surgical resection and topical imiquimod therapy of HPV-associated anal lesions in HIV+-patients, with a focus on healing rates and clinical outcome. We also analysed whether a synergistic treatment effect was detectable. METHODS: This was a retrospective analysis of 97 HIV+ patients who underwent proctological evaluation and treatment over a 10-year period (11/2004 - 11/2015) at our centre. Initial success of surgical treatment, topical imiquimod therapy and the combination of the two strategies were compared. RESULTS: In 53/97 patients (54%), HPV-associated anal disease was diagnosed upon the first visit. In approx. 50% of the patients, the HIV infection was adequately controlled (52 patients with viral load < 40 copies [53.6%]) under cART. The mean age was 41.0 ± 11.6 years. In 7/53 patients with macroscopic C. ac., low-grade and in 18/53 patients high-grade AIN were additionally confirmed. Success rates of surgical resection, imiquimod treatment and the combination of the two were compared. Complete remission of C. ac. and AIN four weeks after treatment was considered a therapeutic success. For C. ac., success rates with imiquimod were 5/25 (20.0%) vs. surgery* 30/57 (52.6%, Mann-Whitney U test p < 0.05) vs. surgery+imiquimod 7/15 (46.7%). For AIN, success rates with imiquimod were 4/24 (16.7%) vs. surgery* 47/83 (56.7%, Mann-Whitney U test p < 0.05) vs. surgery+imiquimod 9/21 (42.8%). In 7/92 (13%) of surgical treatments, complications were reported: four minor and two significant bleeding episodes and one perianal thrombosis. No side effects of imiquimod were documented besides skin irritation. CONCLUSION: Surgery is more effective than topical imiquimod as initial therapy of HPV-related anogenital disease in HIV+-patients. A synergistic effect could not be demonstrated. On this basis, we recommend surgical treatment of C. ac. and AIN in HIV+-patients as first line treatment.