Complicated Diverticulitis Research Articles

Development of an ultrasound-based clinical decision rule to rule-out diverticulitis

The concern for diverticulitis often leads to the use of computed tomography (CT) scans for diagnosis. We aim to develop an ultrasound-based clinical decision rule (CDR) to confidently rule-out the disease without requiring a CT scan. We analyzed data from a prospective study of adult emergency department (ED) patients with suspected diverticulitis who underwent both bedside ultrasound (US) and CT. Patient history, physical examination, laboratory findings, and US results were used to create a CDR via a recursive partitioning model designed to prioritize sensitivity, with a loss matrix heavily penalizing false negatives. We calculated the test characteristics for this CDR (TICS-Rule) and assessed the potential reduction in CT scans and ED length of stay. Data from 149 patients (84 female; mean age 58 ± 16) were used to develop the TICS-Rule. The final model integrates US diagnosis of simple and complicated diverticulitis, along with variables of heart rate, age, history of diverticulosis, vomiting, and leukocytosis. Negative US results and a heart rate below 100 effectively excluded diverticulitis. The sensitivity increased from 54.5% (32.2–75.6) in the US alone to 100% (84.6–100%) for complicated diverticulitis in the model. The TICS-Rule missed no cases of complicated diverticulitis but one case of simple diverticulitis. The median time from ED greeting to US interpretation was 103 min (IQR 62–169), compared to 285 min (IQR 229–372) for CT. The TICS-Rule uses a combination of negative US and heart rate less thanQ1 100 to exclude diverticulitis without the need for a CT scan. Integration of the TICS-Rule offers a promising enhancement to clinical decision-making while reducing both CT use and ED length of stay.

Managing Perforated Diverticulitis: An Overview of Treatment Trends and Clinical Outcomes at a Single Centre in the United Kingdom.

Introduction Perforation represents the most critical manifestation of complicated diverticulitis. In 2008, it was estimated that about 2,000 cases of perforated diverticulitis (PD) were diagnosed in the United Kingdom (UK). Management of PD is evolvingwith considerable variation in approaches between hospitals and countries with an increased trend towards a conservative approach. Objective Our aim is to provide a comprehensive overview of the management strategies and treatment outcomes for PD, with a particular focus on the influence of abscess size and the presence of distant air (DA) on the successof conservative management. Methods Data from 112 patients admitted with PD to a single district hospital in the UK between 2013 and 2018 were retrospectively analysed.CT scan reports and images were examined to assess the size and number of abscesses, as well as the presence of DA. Failed initial management was defined as the need for an alternative therapeutic option after 48 hours during the index admission or readmission within 12 weeks. Follow-up data were also reviewed to evaluate the need for elective resection and stoma reversal. Result In this cohort of 112 patients with PD, a variety of treatment strategies were employed. Antibiotic therapy alone was successful in 46 patients (41%). Radiological management was successful in only six patients (5%). Surgical washout was required in 12 cases (11%), while resection was performed in 40 cases (36%). Best supportive care was provided to eight patients (7%) who were considered unfit for invasive interventions. The success rate was higher in cases with smaller abscesses and no DA (p <0.05). Specifically, 30 out of 45 patients (66.6%) with abscesses less than 4 cm and no DA were managed successfully with conservative treatment, whereas the success rate dropped to 14 out of 30 patients (47%) when DA was present (p<0.05). For abscesses larger than 4 cm, the success rate was seven out of 20 patients (35%) without DA and significantly lower at two out of 20 patients (10%) with DA (p=0.01). The data also show a shift towards increased conservative management over the six-year period, with a steady reduction in the number of surgical interventions. However, 12 patients (19%) were readmitted with complicated diverticulitis after the initial non-resectional management. Conclusion We observed a shift towards more conservative, non-operative management of acute complicated diverticulitis with perforation over the six-year period, likely influenced by advancements in diagnostic and interventional radiology, antibiotic therapy, and minimally invasive techniques. Our data also stress that cases of PD with distant extraluminal air or larger abscesses are less suited to conservative treatment, often necessitating traditional surgical interventions. Long-term follow-up showed a moderate rate of readmissions after non-resectional management, and while stoma reversal was successful in a proportion of patients, many either opted to live with the stoma or were deemed unsuitable for reversal. A larger, multicentre prospective study would likely provide more robust data on this subject.

Robotic Sigmoidectomy for Diverticular Disease.

Introduction: Historically, colon resection was recommended after one episode of complicated diverticulitis. However, current trends favor a more individualized approach. This review examines elective sigmoidectomy for complicated diverticulitis as well as robotic approaches for diverticular disease. Methods: The literature was reviewed for timely (post 2000) and relevant articles regarding robotics and diverticulitis. The articles included large prospective series, retrospective analysis, meta-analyses and randomized controlled trials. Results: Primary anastomosis with or without protective ileostomy has emerged as an alternative to the Hartman's procedure in emergent or urgent surgery in patients without significant comorbidities. Elective sigmoidectomy after an episode of complicated diverticulitis should be decided on a case-by-case basis considering patient characteristics, continued subacute symptoms, complications from the disease, and chance of recurrence episodes. Conclusions: There are several variations techniques for robotic sigmoidectomy outlined in this article, and familiarity with all can help depending on the logistics of the case. Minimally invasive colectomy provides superior patient satisfaction and outcomes.

A novel scoring system for predicting disease severity without CT imaging in acute diverticulitis

PurposeClinical scoring could help physicians identify patients with suspected acute diverticulitis who would benefit from further evaluation using computed tomography imaging. The aim of the study was to identify risk factors for complicated acute diverticulitis and create a risk score to predict disease severity in acute diverticulitis.MethodsPatients diagnosed with CT-verified acute diverticulitis between 2015 and 2017 were included. Data on patients’ clinical and laboratory findings and medical histories were collected retrospectively. Risk factors for complicated acute diverticulitis were identified using univariate and multivariate analyses. Continuous laboratory values were categorised by cut-off points determined using receiver operating characteristic (ROC) analysis. The Acute Diverticulitis Severity Score was formulated using logistic regression analysis.ResultsOf the total 513 patients included in the study, 449 (88%) had UAD, and 64 (12%) had CAD. Older age, significant comorbidities, C-reactive protein level, leucocyte count, vomiting, and body temperature were found to be independently associated with a higher risk for CAD. The novel Acute Diverticulitis Severity Score could reliably detect patients with CAD. The area under the ROC curve was 0.856 (p < 0.001) in discriminating disease severity. While higher scores indicate radiological studies, patients with low scores face an almost non-existent risk for complicated disease, making such studies possibly redundant.ConclusionsThe Acute Diverticulitis Severity Score accurately separated patients with uncomplicated disease from those at risk for complicated disease. This score can be applied in daily clinical practice to select patients requiring further investigation, consequently reducing healthcare costs and burdens.

Analysis of the outcomes of postdiverticulitis investigations: a multicentre cohort study including 1,120 patients.

The aim of this study was to assess the yield of the endoscopic investigations performed following the resolution of acute diverticulitis. A retrospective multicentre study included patients with multislice computed tomography (MSCT)-proven diverticulitis, in four NHS hospitals, between January 2016 and April 2023. The primary outcome was the rate of colonic cancer in the diseased segment. Secondary outcomes included the rate of malignancy in the nondiseased colonic segments, the benign colonic polyp detection rate, the rate of malignancy in the resected surgical specimens in patients who underwent an emergency surgery on the index admission and the rate of complications in the investigated group. A total of 1,120 patients were included in the study, out of which 604 were females, with a median age of 61 years; 731 patients (65%) had uncomplicated diverticulitis (Hinchey 1A) while 389 (35%) had complicated diverticulitis (Hinchey 1B-4). Following the acute episode, 757 (74%) patients had subsequent endoscopic evaluation. The incidence of colorectal cancer (CRC) or advanced adenomas (AA) in patients with uncomplicated diverticulitis was 0.14%. In the complicated diverticulitis group, the incidence of CRC/AA in patients with Hinchey 1b and Hinchey 2 was 1.4% and 5.4%, respectively. Out of the 102 patients who underwent emergency colonic resection for suspected perforated diverticulitis, 18 (17.6%) had histological evidence of colonic malignancy. Endoscopic investigations following uncomplicated diverticulitis have a low yield for sinister colonic pathology. Colonoscopy should be planned following complicated diverticulitis and in patients with uncomplicated diverticulitis with suspicious radiological finding on index imaging or in patients with ongoing clinical manifestations. In patients who undergo emergency surgery, oncological principles should be applied whenever possible.

The early biomarker of immature granulocyte count in predicting right-side colonic complicated acute diverticulitis: a retrospective cohort study

ObjectiveEarly identification of complicated acute diverticulitis(cAD) is especially significant for clinical physician and surgeon to reduce the antibiotic usage and the risk of emergency surgery. This study was aimed to investigate the significance of immature granulocyte(IG) count in early prediction for right-side(Rt-side) cAD.MethodsThe patients with Rt-side colonic acute diverticulitis was enrolled between January, 2019 and March, 2024, and divided into complicated and simple acute diverticulitis group(cAD and sAD). The data about demographic, clinical and laboratory parameters were collected and compared. Logistic regression analysis and receiver operator characteristic(ROC) curves were used to assess the predictive values of these parameters for Rt-side complicated diverticulitis.Results289 participants who met the inclusion criteria were followed as 31 patients in cAD group and 258 in sAD group. Compared to sAD group, cAD group had the higher body mass index(BMI) and peripheral blood routine parameters, especially IG count, systemic immune inflammation index(SII) and neutrophil-to-lymphocyte ratio(NLR), with the statistically significant differences(P<0.001). Moreover, logistic regression analysis indicated that IG count was a significant and independent predictors for cAD(OR 4.92, 95%CI 3.86–8.39). In the ROC analysis, area under the ROC curves (AUC) was found for IG count(0.93(95%CI 0.88–0.99) ) and SII(0.88(95%CI 0.820–0.95)). The optimal cut-off value of IG count was 0.10 with the largest sensitivity of 80.60% and specificity of 100.00% for identifying Rt-side colonic complicated diverticulitis.ConclusionIG count was a more comparable and independent predictor for Rt-side colonic complicated diverticulitis with a largest AUC than other markers in complete blood count (CBC). Given its early arise, easy accessibility and no-radiation, it can largely convince physicians’ decision-making of antibiotic abuse and surgeons’ early intervention in Rt-side colonic cAD.

Laparoscopic Hartmann's procedure for complicated diverticulitis is associated with lower superficial surgical site infections compared to open surgery with similar other outcomes: a NSQIP-based, propensity score matched analysis.

Open Hartmann's procedure has traditionally been the procedure of choice to treat complicated diverticulitis. We analyzed the ACS-NSQIP database to compare outcomes in patients who underwent emergent laparoscopic Hartmann's procedure (LHP) to those who had an open Hartmann's procedure (OHP). Data analyzed from 2015 to 2019 using ICD-10 codes. Patients were matched on several important covariates using a propensity score matching method (PSM). Patients were matched in a 4:1 ratio of controls to cases based on the propensity score. We identified 5026, of which 456 had LHP and 4570 had OHP. PSM analysis yielded 369 LHP and 1476 OHP patients. LHP had lower rates of superficial surgical site infection (SSSI) compared to OHP (2.44% vs. 5.89%, p = 0.007). LHP had similar post-operative outcomes compared to OHP, including 30-day mortality (5.15% vs. 2.98%, p = 0.060), organ space surgical site infection (OSSSI) (14.36% vs. 12.60%, p = 0.161), wound disruption (1.36% vs. 2.44%, p = 0.349), median LOS (8 vs. 9 days, p = 0.252), readmission within 30 days (11.92% vs. 8.67%, p = 0.176), rate of reoperation (6.0 vs. 6.5%, p = 0.897), and discharge to home (76% vs. 77%, p = 0.992). LHP had longer operative times compared to OHP (median 129 vs. 118min, p < 0.0001). The LHP is associated with lower rates of SSSI. However, it is not associated with lower rates of mortality, OSSSI, readmissions and reoperations within 30 days. Surgical times are longer in LHP. More studies are needed to determine whether LHP offers advantages in the long-term, particularly in rates of incisional hernia and colostomy closure.

S4848 Beyond the Bowel: Lung cancer Presenting as Complicated Diverticulitis

S4848 Beyond the Bowel: Lung cancer Presenting as Complicated Diverticulitis

S4586 Pyogenic Liver Abscesses as a Unique Complication of Recurrent Diverticulitis

S4586 Pyogenic Liver Abscesses as a Unique Complication of Recurrent Diverticulitis

Rare symptom of left inguinal abscess secondary to a retroperitoneal perforation of diverticulitis of the sigmoid colon: A case report.

Complicated colorectal diverticulitis could be fatal, and an abscess caused by this complication is usually formed at the pericolic, mesenteric, or pelvic abscess. Therefore, we report a rare case of sigmoid colon diverticulitis that developed a large inguinal abscess. A woman in her 70s was admitted to our hospital with a chief complaint of left inguinal swelling and tenderness 1 week before admission. Physical examination showed swelling, induration, and tenderness in the left inguinal region. Blood tests revealed elevated inflammatory reaction with C-reactive protein of 11.85 mg/dL and white blood cells of 10,300/μL. Contrast-enhanced computed tomography showed multiple colorectal diverticula in the sigmoid colon, edematous wall thickening with surrounding fatty tissue opacity, and abscess formation with gas in the left inguinal region extending from the left retroperitoneum. The diagnosis was sigmoid colon diverticulitis with large abscess formation in the left inguinal region. Immediate percutaneous drainage of the left inguinal region was performed, as no sign of panperitonitis was observed. Intravenous piperacillin-tazobactam of 4.5 g was administered every 6 hours for 14 days. The inflammatory response improved, with C-reactive protein of 1.11 mg/dL and white blood cell of 5600/μL. Computed tomography of the abdomen confirmed the disappearance of the abscess in the left inguinal region, and complete epithelialization of the wound was achieved 60 days after the drainage. The patient is under observation without recurrence of diverticulitis. We report a rare case of sigmoid colon diverticulitis that developed a large inguinal abscess, which was immediately improved by percutaneous drainage and appropriate antibiotics administration.

Predicting complicated acute diverticulitis with the HALP score: A retrospective study

ObjectiveHALP score is a scoring system consisting of hemoglobin, albumin, lymphocyte and platelet. It is different from other prognostic markers because it provides information about both inflammation and immunonutrition status. This study aims to evaluate the severity of the disease and the level of prognosis in patients diagnosed with acute diverticulitis. Material methods190 patients diagnosed with acute diverticulitis between January 2017 and June 2023 were included in the study. The patients were divided into two separate groups according to the Hinchey classification. The prognostic effect of inflammatory markers and HALP score was examined. ResultThe median values of C-reactive protein, white blood cell count, neutrophil count, HALP score, and hospitalization duration were significantly higher in patients diagnosed with complicated diverticulitis than in those diagnosed with uncomplicated diverticulitis. (p < 0.001, p = 0.045, p = 0.004, p < 0.001 and p < 0.001, respectively). The distinguishing feature of the HALP score in predicting the complexity of the diagnosis of diverticulitis was evaluated using ROC analysis. Area Under Curve (AUC) value was found to be 0.723 (p < 0.001). According to the ROC curve, the sensitivity and specificity for the cut-off value of HALP score ≤44.1 were 66.7 % and 75.0 %, respectively. ConclusionHALP score is an inexpensive parameter that can be used safely to determine the severity and prognosis of acute diverticulitis.

Is the NICE procedure the great equalizer for patients with high BMI undergoing resection for diverticulitis?

By 2030, projections indicate that nearly half of USS adults will be obese, with 29 states exceeding a 50% obesity rate. High Body Mass Index (BMI) presents particular challenges in treating diverticulitis, including worsened symptoms and increased risk of surgical complications. The Robotic Natural orifice Intracorporeal Anastomosis with Transrectal Extraction (NICE) procedure has been developed for colorectal surgeries to tackle these challenges. This study evaluates the efficacy of the Robotic NICE procedure in achieving comparable surgical outcomes in patients with both high and normal BMI. This retrospective cohort study assessed the outcomes of robotic-assisted colectomy utilizing the NICE technique in patients with diverticulitis, dividing them into two groups based on BMI: high BMI (≥ 30 kg/m^2) and non-high BMI (< 30 kg/m^2). Among the 194 patients analyzed, the incidence of complicated diverticulitis was significantly higher in the high BMI group (60.5%) compared to the non-high BMI group (39%; p = 0.003).The high BMI group had higher ASA scores, indicating sicker patients. The high BMI group also had a significantly higher rate of unplanned operations within 30 days (7.9% vs. 1.7%, p = 0.034). However, no significant differences were observed in the length of hospital stay, time to first flatus, or ICU admission rates between the two groups. Binary logistic regression highlighted the length of stay as a significant predictor of postoperative complications (Odds Ratio: 1.9686, 95% CI: 1.372-2.825, p < 0.001). Other factors, including age, operative time, and gender, did not significantly predict complications. The findings suggest that the Robotic NICE procedure can mitigate some of the challenges typically associated with conventional minimally invasive surgery in which abdominal wall incision is made, providing consistent outcomes regardless of BMI. Further research is needed to explore long-term benefits, aiming to establish this approach as a standard for managing diverticulitis in our patient population.

Case Report: A 31-Year-Old Man with Relapsing Complicated Diverticulitis after Initial Conservative Treatment

BACKGROUND: There is controversy regarding the surgical approach for severe complications of diverticular disease. The classical approach has been a Hartmann’s procedure, but laparoscopic lavage and drainage has been suggested as an alternative. We present a patient who initially responded to conservative management of complicated diverticulitis, but had a recurrence that was managed surgically. CASE PRESENTATION: A 31-year-old man presented with Hinchey Stage I diverticulitis and was discharged from the hospital after medical management. Six days later, he returned to the hospital with radiographic evidence of a pericolonic abscess. The patient was taken to the operating room for laparoscopic drainage with placement of a drain in the abscess cavity. He required reoperation with sigmoid colon resection, primary anastomosis, and diverting ileostomy. DISCUSSION: Despite requiring reoperation, the authors believe that initial conservative management possibly prevented progression to generalized feculent peritonitis. If this had occurred, the patient may have required Hartmann’s procedure, which is associated with more complications than primary anastomosis with protective ileostomy. CONCLUSION: The patient had recurrence of complicated diverticular disease that was initially managed conservatively and then with laparoscopic drainage, followed by primary anastomosis with protective ileostomy. Given individual patient factors, the authors believe that he was managed optimally. There is currently controversy between the use of laparoscopic lavage and drainage versus Hartmann’s procedure for the management of complicated colonic diverticular disease and more investigation is required on the subject.

WP5.4 - Uncomplicated acute diverticulitis can be managed in an ambulatory setting

Abstract Aims We aimed to evaluate a treatment pathway for acute diverticulitis at our Surgical Emergency Unit (SEU) and analyse the outcomes. We hypothesised that a significant number of patients can be managed in an ambulatory setting. Methods We reviewed clinical records of all adult patients (aged ≥18 years) admitted with acute diverticulitis between April 2022 to March 2023. Those presenting with clinical suspicion of acute diverticulitis were assessed clinically, biochemically and radiologically with cross-sectional imaging. This allowed early detection and treatment for those with complications of diverticulitis, and early ambulation within 24 hours for those without. We evaluated their length of stay, modified Hinchey classification of disease severity, antibiotic prescription, and readmission for diverticulitis within 3 months after discharge. Results We included 370 patients (160 males, 210 females). The mean age was 63.2 (range 23-96) years. Fifty-five (14.9%) presented with acute complicated diverticulitis (Hinchey classification 1b or above). In total, 218 patients (58.9%) were ambulated within 24 hours of presentation. The proportion of patients ambulated early with and without complications of diverticulitis were 21.8% (12/55) and 65.4% (206/315) respectively (p&amp;lt;0.001). The average length of stay in hospital was 54 (range 0.3-711) hours. Among those ambulated early, 196 were prescribed with oral antibiotics. Only 10 patients (4.6%) had persistent symptoms after 2 weeks from ambulation. Twenty-six patients (11.9%) were subsequently readmitted within 3 months. Conclusions In our experience, over half of patients diagnosed with acute diverticulitis were successfully managed on an ambulatory pathway. There was a low percentage with persistent symptoms or readmission. The development of appropriate patient pathways is crucial to improve efficient use of hospital resources.

FP1.5 - Safety and efficacy of Ambulatory treatment of uncomplicated acute diverticulitis: A two-centre cohort study and a proposal of an Ambulatory pathway

Abstract Aim This study aimed to assess the safety and efficacy of ambulatory treatment in patients with uncomplicated acute diverticulitis (AD) compared with inpatient treatment. Methods This is a retrospective comparative study conducted in two hospitals. All patients presented to the emergency department with CT-confirmed Hichney 1a AD during the period from 01/01/2022 to 31/12/2022 were included in this study. Patients with complicated diverticulitis or CT was not performed were excluded. All patients were followed for 12 months for re-admission and AD recurrence. Data analysis was performed with SPSS 27. Results A total of 137 patients were presented during the study period with CT-confirmed Hinchey 1a AD. The median age was 62 (24-94) years old, with a female-to-male ratio of 1.7:1. In the majority of patients (75.9%), WBCS was &amp;lt; 15 and CRP &amp;lt; 100. Moreover, 37.2% had previous AD, and it was complicated in 5.8%. For 12 months of follow-up, 19% of the cases developed diverticulitis recurrence. However, only 1 patient required surgery, and no patient required radiology intervention. No mortality was reported. A luminal investigation (CT colonoscopy or endoscopy) was organized in 61.3%, and colon cancer was detected in one patient. A comparison of patients who were treated as ambulatory (n=35) versus inpatient (n= 102) showed no significant difference regarding re-admission and recurrence of AD (P= 0.22) and surgical intervention (P=0.5) during 1-year follow-up. Conclusion With comparable results to inpatient treatment, the Ambulatory treatment of Hinchey 1a AD is safe and feasible and provides a reduction of treatment expenses.

SP5.3 - Systematic review and meta-analysis of the management of acute uncomplicated diverticulitis: Time to change the traditional practice

Abstract Background To evaluate comparative outcomes of outpatient versus inpatient treatment and antibiotics versus no antibiotics approach in the treatment of uncomplicated (Hinchey 1a) acute diverticulitis. The protocol of this review was registered in PROSPERO (CRD42023488826). Methods A systematic online search was conducted using electronic databases. Comparative studies of outpatient (OP) versus inpatient (IP) treatment and antibiotics (ABX) versus no antibiotics (NABX) approach in the treatment of uncomplicated (Hinchey 1a) acute diverticulitis were included. The primary outcome was diverticulitis recurrence. Emergency surgical resection, elective surgical resection, development of complicated diverticulitis, mortality rate, and length of hospital (LOS) were the other evaluated secondary outcomes. Results The literature search identified 14 studies (n=3,875) comparing NABX (n=2,008) versus ABX (n=1,867). The NABX group showed a lower disease recurrence rate and shorter LOS compared with the ABX group (P=0.01) and (P=0.004). No significant difference was observed in emergency resections (P=0.33), elective resections (P=0.73), development of complicated diverticulitis (P=0.65), hospital re-admissions (P=0.65) and 30-day mortality rate (P=0.91). Twelve studies (n=2,286) compared OP (n=1,021) versus IP (n=1,265) management of uncomplicated acute diverticulitis. The two groups were comparable for the following outcomes: treatment failure (P=0.10), emergency surgical resection (P=0.40), elective resection (P=0.30), diverticulitis recurrence (P=0.22), and mortality (P=0.61). Conclusion Compared with the use of ABX, the NABX approach seems to provide similar clinical outcomes and shorter LOS. Moreover, OP treatment of Hinchey 1a acute diverticulitis is comparable with IP management and presumably leads to cost savings in depleted healthcare systems

FP3.13 - Acute Complicated Diverticulitis: Colorectal Cancer in Disguise? Five Years of Follow-up Practice at a 600-bed Hospital

Abstract Aims Complicated diverticular disease is associated with colonic neoplasia rates of 7.8% to 10.9%. ACPGBI guidelines recommend optical or virtual colonoscopy six weeks following an attack of acute complicated diverticulitis unless performed within the preceding two years. It has been posited that flexible sigmoidoscopy may be sufficient to rule out malignancy given that diverticulitis predominantly affects the sigmoid colon. Five years of practice at a 600-bed hospital was audited to the ACPGBI standard and malignancy rates and locations investigated. Methods All emergency admissions coded for acute complicated diverticulitis from January 2017 to December 2022 were included. Patient electronic records were reviewed retrospectively for demographic data, operation notes, as well as radiology, endoscopy and histology reports. Results A total of 197 patients were included in the study period. 97 cases underwent emergency or semi-elective resection within one year. 8 patients had colonic visualisation in the two years prior to their attack, leaving 92 cases in whom colonic visualisation was indicated. 44 patients had colonoscopy, 22 had flexible sigmoidoscopy, 2 had CT colonography and 24 had no further imaging. 7 malignancies were identified, 5 from resection specimens and 2 from endoscopy. All tumours were in sigmoid colon. Conclusions The ACPGBI standard was met in 50% (46/92) of cases. If flexible sigmoidoscopy were deemed acceptable this would increase to 74% (68/92). Malignancy was identified in 4% (7/197) of cases. All malignancies were in the range of flexible sigmoidoscopy, suggesting full colonoscopy may be superfluous. Less extensive endoscopy may reduce procedure duration, bowel preparation and patient discomfort.

FP3.5 - Colonoscopy post diverticulitis – Compliance with ACPGBI guidance in a single centre audit

Abstract Introduction For decades the management of acute diverticulitis (AD) has included endoscopic evaluation to exclude malignancy. In complicated AD, the incidence of colonic neoplasia is between 7.8%-10.9% (1-5) so interval colonoscopy remains mandatory. However, in uncomplicated AD, the incidence is low, 1.6%-1.9% (1-5), therefore the routine colonoscopy may be unnecessary in this group. This audit aims to assess our single-centre compliance with the ACPGBI guidance of colonoscopy post-diverticulitis. Methods A retrospective single-centre audit enrolled 120 patients with CT-confirmed diverticulitis over 18 months. Patient identification involved on-call handover sheets or PACS reports containing "diverticulitis" or "complicated diverticular disease." Patient scans were reviewed, and their management was studied. Results Number Number Uncomplicated Surgery 0 (Hinchey 1A+1B) No surgery 90 (75%) Colonoscopy 71 (59%) No colonoscopy 19 (16%) Surgery 15 (12.5%) Complicated (Hinchey 2 or greater) No surgery 15 (12.5%) Colonoscopy 11 (9.2%) No colonoscopy 4 (3.3%) Total 120 3.3% of complicated diverticulitis did not undergo colonoscopy due to patient choice, comorbidities or frailty. Among the 82 patients who underwent colonoscopy, there was no detection of CRC, resulting in a 0% detection rate. Conclusion In this 120-patient cohort, the incidence of colorectal cancer was 0%, which is in keeping with the published data. 78.9% of patients with uncomplicated diverticulitis underwent colonoscopy, which may have been unnecessary. The use of faecal immunochemical testing may be beneficial as an adjunct to avoid endoscopy in this group, whilst taking into consideration individual risk factors such as age, clinical suspicion of malignancy or concerning features on imaging.

Nonoperative management of acute complicated diverticulitis with pericolic and/or distant extraluminal air: A systematic review.

Colonic Diverticular Disease (CDD) is a multifactorial inflammatory disease. Acute diverticulitis (AD), with extraluminal free air (both pericolic and distant), represents about 15% of radiological scenarios and remains a therapeutic challenge for surgeons. Currently, the WSES guidelines suggest trying a conservative strategy both in the presence of pericolic and distant free extraluminal air, even if both have respectively weak recommendation based on low/very low-quality evidence. We performed a systematic review following the Preferred Reporting Items for Systematic Reviews and Meta-Analyzes guidelines. PubMed/MEDLINE, Scopus, Web of Science, and Embase databases were used to identify articles of interest. A total of 2380 patients with AD and extraluminal free air (both pericolic and distant) who underwent nonoperative management (NOM) were analyzed. Of the 2380 patients, 2095(88%) were successfully treated with NOM, while 285 (12%) patients failed. A total of 1574 (93.1%) patients with pericolic extraluminal free air had a successful NOM with 6.9% (117) failure rates, while 135 (71.1%) patients with distant extraluminal free air had a successful NOM with 28.9% (55) failure rates. Regarding distant recurrence, we recorded a rate of 18.3% (261/1430), while a rate of 11.3% (167/1472) was recorded for patients undergoing elective surgery. NOM for patients with AD and extraluminal free air (both pericolic and distant) seems to be feasible and safe despite a higher failure rate in the distant subgroup, which remains the most challenging clinical scenario to deal with through conservative treatment.

Clinical relevance of the 3-cm threshold in sigmoid diverticulitis with abscess: consensus or quandary?

PurposeDiverticular abscess is a common manifestation of acute complicated diverticulitis. We aimed to analyze the clinical course of patients with diverticular abscess initially treated conservatively.MethodsAll patients with diverticular abscess undergoing elective or urgent/emergency surgery from October 2004 to October 2022 were identified from our institutional database. Depending on the abscess size, patients were divided into group A (≤ 3 cm) and group B (> 3 cm). Conservative treatment failure was defined as clinical deterioration, persistent or recurrent abscess, or urgent/emergency surgery. Baseline characteristics and short-term perioperative outcomes were recorded and compared between both groups. Uni- and multivariate analyses were conducted to identify determinants of conservative treatment failure and overall ostomy formation.ResultsA total of 105 patients were enrolled into group A (n = 73) and group B (n = 32). Uni- and multivariate analyses revealed abscess size as the only significant factor of conservative therapy failure [OR 9.904; p < 0.0001], while overall ostomy formation was significantly affected by an increased body mass index (BMI) [OR 1.366; p = 0.026]. There were no significant differences in perioperative outcome with the exception of a longer total hospital stay in patients managed with abscess drainage compared to antibiotics alone prior surgery in group B (p = 0.045).ConclusionAbscess diameter > 3 cm is not just an arbitrary chosen cut-off value for drainage placement but has a prognostic impact on medical treatment failure in patients with complicated acute diverticulitis. In this subgroup, the choice between primary drainage and antibiotics does not appear to influence outcome at the cost of prolonged hospital stay after drainage insertion.