Recurrent Acute Diverticulitis: When to Operate?

Diverticulosis and Diverticulitis: Epidemiology, Pathophysiology, and Current Treatment Trends

Diverticular disease is a common surgical condition, especially in the Western world. Its existence is well known in Asian countries as well; however, its impact on Asian health care is not the same as that in Western countries. Diverticular disease has a variable presentation, and its implications can be challenging to manage both for the patient and the medical professionals. Diet and lifestyle are commonly associated with its etiology. In Western countries, much attention is given to diverticular disease, and with the acceptance of colonoscopy as a surveillance investigation, a greater number of people are diagnosed with diverticular disease at an early stage and overall. In acute presentations, a CT scan of the abdomen remains the investigation of choice. The most common presentation of diverticular disease is pain in the abdomen or a change in bowel habits. In most cases, diverticular disease is treated with medical intervention; however, in cases associated with severe complications or advanced stages, surgical modality remains the primary treatment.

Investigation of the clinical features and recurrence patterns of acute right-sided colonic diverticulitis: A retrospective cohort study

Background

Right-sided colonic diverticulitis (RCD) and left-sided colonic diverticulitis (LCD) are considered distinct diseases. However, separate guidelines for RCD do not exist. Since the establishment of RCD management would first require evaluation of disease characteristics and recurrence patterns, this study has aimed to investigate the differences in the clinical characteristics between RCD and LCD and the recurrence patterns of RCD.

Methods

Patients admitted for colonic diverticulitis between January 2012 and August 2020 were retrospectively reviewed. Clinical characteristics and recurrence rates in RCD and LCD patients, and predictors for recurrence and the recurrence patterns of RCD were analyzed.

Results

In total, 446 colonic diverticulitis patients (343 RCD, 103 LCD) were included in this study. RCD patients were more likely to be male, younger, taller, heavier, smoke, drink alcohol, have better physical performance scores, lower modified Hinchey stages and better initial laboratory findings. LCD patients were more likely to receive invasive treatments, have longer fasting and hospital days, higher mortality and cumulative recurrence rates (20.5% vs. 30.4%, P = 0.007). Recurrences in most RCD patients were of similar disease severity and received the same treatments for initial attacks, with rates of recurrence increasing after each recurrence. Predictors of the recurrence of RCD were complicated diverticulitis (hazard ratio[HR] 2.512, 95% confidence interval[CI] 0.127–5.599, p = 0.024) and percutaneous drainage (HR 6.549, 95% CI 1.535–27.930, p = 0.011).

Conclusion

RCD is less severe and has a lower recurrence rate than LCD, suggesting that RCD should be treated conservatively. Patients with complicated diseases and those requiring percutaneous drainage are more likely to experience a disease recurrence, suggesting nonsurgical management may be insufficient.

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Right-sided colonic diverticulitis patients were more likely to be male, younger, taller, heavier, smoke and drink alcohol.

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Right-sided colonic diverticulitis is less severe and has a lower recurrence rate than left-sided colonic diverticulitis.

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Patients with complicated disease and those requiring percutaneous drainage are more likely to experience disease recurrence.

Right-sided diverticulitis in a Western population

BACKGROUND

While left-sided colonic diverticular disease is common in Western Caucasian populations, right-sided colonic disease (RCD) is rare. The present study aimed to determine the rate of RCD and to identify the symptoms, clinical features, treatment, and outcomes in a single medical center in Israel.

METHODS

Data for this descriptive retrospective analysis were collected from the electronic medical records of all patients diagnosed with colonic diverticulitis from January 2014 to June 2019.

RESULTS

During the study period, 1000 patients with diverticulitis were admitted to our institution, of which 99 had RCD (10%). Mean age was 50.2 years. The main presenting symptom was acute onset of right-sided abdominal pain. The diagnosis was made almost exclusively by computed tomography scan and the cecum was the most frequent site. The clinical course was benign, without major complications for most patients (90.1%). Nine patients presented with abscess (n = 1), covered perforation (n = 7), or partial obstruction (n = 1). All patients were treated with intravenous antibiotics with a median length of hospital stay of 3 days and a median 9 days of antibiotic treatment. Only 1 patient underwent diagnostic laparoscopy due to suspected intestinal perforation. Three patients experienced disease recurrence after a median follow-up of 48 months. Upon recovery, half of the patients underwent colonoscopy; no further pathology was found in any.

CONCLUSION

Unlike sigmoid colon diverticulitis, the incidence of RCD in Western populations is low. The clinical course is benign, with conservative treatment without the need for surgery. The complication and recurrence rates are low.

What Are the Long-Term Changes to Bowel Function Patient-reported Outcomes After Elective Sigmoidectomy for Diverticular Disease?: Observational Study of Patients Undergoing Elective Sigmoidectomy for Diverticular Disease

Objective

To evaluate long-term changes to bowel function after elective sigmoidectomy for diverticular disease.

Background

For patients with diverticular disease, choosing surgery is often based on the presumption of improvement in preoperative symptoms. Our group previously reported bowel function does not change in the early perioperative period; however, studies of long-term outcomes are limited.

Methods

This is an observational study of patients that underwent elective sigmoidectomy for diverticular disease and completed the Colorectal Functional Outcome (COREFO) questionnaire before surgery. Patients were stratified into two groups based on presence or absence of a preoperative symptomatic score (i.e., total COREFO ≥ 15). Long-term bowel function (>1 year from surgery) was assessed using the COREFO questionnaire via telephone or subsequent clinic visit. Paired t-tests compared mean preoperative scores to mean long-term scores.

Results

Fifty-one patients met inclusion criteria (21 symptomatic, 30 asymptomatic). All symptomatic patients had uncomplicated disease, whereas 90% of asymptomatic patients had complicated disease. Median time from operation to questionnaire completion was 23 months (IQR = 13-34). Asymptomatic patients demonstrated impaired bowel function, predominantly driven by changes in the social impact domain. Symptomatic patients demonstrated improved bowel function, driven by changes in the incontinence, social impact, stool-related aspects, and need for medication domains.

Conclusions

In the long-term after elective sigmoidectomy for diverticular disease, patients with symptomatic bowel function preoperatively improve substantially, while those with asymptomatic preoperative scores demonstrate statistically significant impairment. Patients determined to be symptomatic with patient-reported outcomes likely benefit long-term from sigmoid resection.Mini-Abstract: In this manuscript, long-term changes to patient-reported bowel function were assessed using a validated questionnaire after sigmoidectomy for diverticular disease. We found that in patients with symptomatic preoperative bowel function, long-term bowel function improved after elective resection. Alternatively, patients with asymptomatic preoperative bowel function demonstrated long-term impairment in bowel function.

Recurrent, Complicated Diverticulitis With Atypical Features

Diverticular disease is a common condition responsible for significant costs to the healthcare system in the Western world. It ranges from asymptomatic diverticulosis to complicated diverticulitis. Here, we present a unique case of recurrent, complicated diverticulitis in a 62-year-old Caucasian male. Within a span of one year, he was hospitalized six times with diverticulitis before undergoing elective sigmoid colon resection. Imaging showed diverticulitis of distal descending and proximal sigmoid colon with sealed perforation, recurrent abscesses, and formation of colocutaneous fistulas. During each hospitalization, the patient was advised to follow up with general surgery and/or outpatient gastroenterology but chose not to do so. Eventually, he required an elective sigmoid colectomy with a takedown of the colocutaneous fistulas. In this case report, we discuss the atypical features and criteria for prophylactic colon resection in diverticulitis to highlight the importance of outpatient follow-up with general surgery and gastroenterology.

Risk factors and incidence of 90-day readmission for diverticulitis after an acute diverticulitis index admission

OBJECTIVES

Acute diverticulitis is the third most frequent cause of gastrointestinal admission in the USA. We sought to determine the incidence of recurrence within a 90-day period and determine its impact on mortality and hospital utilization.

METHODS

Nationwide Readmission Database (NRD) 2016 was used to identify patients ≥ 18 years old with a principal diagnosis of acute diverticulitis who were readmitted for recurrence within 90 days. The primary outcome was 90-day readmission rate for acute diverticulitis, and predictors were analyzed using a multivariate regression analysis. Secondary outcomes were mortality and hospital resource utilization.

RESULTS

A total of 171,238 admissions were included which met inclusion criteria. Ninety-day readmission for acute diverticulitis after index diverticulitis hospitalization was 8.9%. Readmissions were associated with in-hospital additional total cost of $444,726,560 and 65,685 total hospital days and mortality rate of 4.69% compared with mortality rate of 5.20% on index hospitalization (p < 0.01). In multivariable analysis, increased odds of readmission were associated with disposition against medical advice (OR 1.75, 95% CI 1.31-2.33), younger age (OR 0.98, 95% CI 0.98-0.99), and shorter length of stay (OR 0.99, CI 0.98-0.99).

CONCLUSIONS

Acute diverticulitis is frequently associated with recurrence within 90 days and bears a substantial financial and mortality burden. Targeted interventions are needed to minimize readmissions in identified subpopulations.

Increased incidence and recurrence rates of acute diverticulitis in patients with irritable bowel syndrome

AIM

Acute diverticulitis (AD) is commonly diagnosed in outpatient and emergency departments and is associated with severe complications such as perforation and fistula. Symptoms of irritable bowel syndrome (IBS), such as abdominal pain, constipation and diarrhoea, are also common with AD. This study aimed to evaluate the strength of a possible association between IBS and AD.

METHOD

This retrospective study analysed records from Taiwan's National Health Insurance Research Database and involved a total of 25 810 patients, including 12 905 IBS patients diagnosed between 2000 and 2012. The IBS and non-IBS cohorts were matched by propensity score for age, gender, comorbidities and medication, then compared for confounding variables by the chi-square test or Student's t-test. The association between AD and IBS was determined using Cox proportional hazards models. Kaplan-Meier curves assessed the cumulative incidence of AD in IBS patients.

RESULTS

The overall incidence of AD was 3.95-fold higher in the IBS cohort than in the non-IBS cohort (63.34 vs 16.02 per 100 000 person-years, respectively) and IBS was an independent risk factor for subsequent diagnosis of AD in multivariate Cox proportional hazards regression model adjusted hazards ratio (aHR = 3.84, 95% CI = 2.29-6.44, P < 0.001) and Kaplan-Meier (log-rank test, P < 0.001) analysis. IBS was also associated with a high recurrence rate of AD (aHR = 8.30, 95% CI = 1.07-64.30, P = 0.04).

CONCLUSION

The epidemiological evidence in this study demonstrates that patients with IBS are associated with a higher incidence of AD and also its recurrence.

Drains, Germs, or Steel: Multidisciplinary Management of Acute Colonic Diverticulitis

The medical and surgical management of uncomplicated diverticulitis has changed over the last several years. Although immunocompetent patients or those without comorbidities can be treated with antibiotics as an outpatient, the efficacy of high-fiber intake or drugs such as mesalamine or rifaximin is not yet clearly established in the treatment of acute episodes and in the prevention of recurrences. On the other hand, the choice between antibiotic treatment and percutaneous drainage is not always obvious in diverticulitis complicated by abscess formation, especially for larger abscesses; although the results of studies comparing the two approaches remain controversial, surgery must be pursued for abscesses > 8 cm. For emergency surgery, the debate is still ongoing regarding laparoscopic lavage and surgical resection followed by primary anastomosis, since for both approaches the published reports are not in agreement regarding possible benefits. Therefore, these approaches are recommended only for selected patients under the care of experienced surgeons. Also, the contribution of elective surgery toward the overall approach has been revised; currently, it is reserved primarily for patients with a high risk of recurrence and whenever more conservative treatments were not effective.

Quantification of admission diagnoses in an employer-based transitions of care program

BACKGROUND

Transitions of care (TOC) are critical times for patients, and if not conducted effectively, can lead to adverse events, preventable treatment, and costly readmissions. TOC programs are implemented to improve patient care, prevent hospital readmissions, and lower financial penalties associated with readmissions. Medicare's hospital readmission reduction program (HRRP), a value-based care model, targets specific conditions and procedures. Although many TOC programs focus on HRRP conditions, there are few studies looking at prevalence of disease states seen in TOC programs embedded within an employer-based insurance program in which financial ramifications exist for all hospitalizations. There is a need to better understand the potential missed opportunities for employer-based programs solely addressing HRRP conditions.

OBJECTIVE

To quantify admission diagnoses in a nontargeted employer-based TOC program.

METHODS

We conducted a descriptive study of patients enrolled in a TOC program conducted by a self-insured grocery store chain. We included all patients enrolled in this TOC program who experienced a hospital admission between January 1, 2017 and August 31, 2019. Each admission diagnosis was categorized into the appropriate anatomic and physiological groups using the 2020 ICD-10-CM categories. Data were reported using descriptive statistics.

RESULTS

We identified 180 eligible patients with 328 hospital admissions. The mean (± SD) age of the study population was 53.6 ± 14.4 years. The most common admission diagnoses were those in the digestive category (n = 61, 18.6% of admissions); elective total hip or knee replacement was the most prevalent HRRP condition (n = 30, 9.1% of admissions). Overall, HRRP conditions accounted for 58 (17.7%) of eligible admissions.

CONCLUSION

Most of the patients seen by an employer-based TOC program were for conditions not targeted by the HRRP. By including patients beyond those covered by the HRRP, such TOC programs may realize greater improvements in financial and clinical outcomes. These benefits, however, need to be confirmed in future studies.

Acquired Diverticulosis of the Entire Colon in a Cadaver

Diverticulosis involving the entire colon is rare in Western society. During a routine dissection of a 74-year-old Caucasian female cadaver, who died from vascular disease complications, diverticula were observed in the ascending, transverse, and descending colon. A total of 413 diverticula were manually counted. The majority of diverticula arose from the right and transverse colon, which is atypical of the disease in Western society. Histological examination of sections from sample diverticula reveals morphology consistent with pseudodiverticula, suggestive of acquired disease. Pancolonic diverticulosis may be associated with systemic diseases such as collagen disorders, vascular complications, and increased risk of recurrent diverticulitis. This case is an example of a rare manifestation of diverticular disease that is important for clinicians to recognize when evaluating and treating patients with gastrointestinal symptoms.

Paradigm shift: the Copernican revolution in diverticular disease

Diverticular disease (DD) is an umbrella definition that includes different clinical conditions ranging from diverticulosis to severe and potentially life-threatening complications. In the last decade, new concepts regarding pathogenetic alterations have been developed, while the diagnostic, clinical and therapeutic approaches to the management of DD patients have changed. The protective role of dietary factors (i.e., fiber) has been questioned, whilst some drugs widely used in clinical practice have been found to have a deleterious effect. The use of antibiotics in all patients with acute uncomplicated diverticulitis was reconsidered, as well as the need for a surgical approach in these patients. Conflicting recommendations in different guidelines were proposed for the treatment of symptomatic uncomplicated DD. An endoscopic classification of DD was introduced, and a "curative" endoscopic approach has been pioneered. Based on these observations, which together amount to a kind of "Copernican revolution" in the management of DD patients, we performed a comprehensive and critical reappraisal of the proposed modifications, aiming to discriminate between certainties and doubts on this issue.