Segmental colitis associated with diverticula: a rare clinical entity and a new challenge for the gastroenterologist

Multidimensional Prognostic Index Predicts Clinical Outcome and Mortality in Hospitalised Older Patients with Diverticular Disease

INTRODUCTION

The Multidimensional Prognostic Index (MPI) is a validated tool for assessing mortality risk in hospitalised patients. We aimed to evaluate whether the MPI predicted mortality and the risk of developing diverticular disease (DD) complications in older patients.

METHODS

This is a multicentre study conducted in January 2016-March 2018. All patients with DD aged 65 years and older were included. Patients were stratified into three groups according to MPI groups (1, low risk; 2, moderate risk; 3, high risk). Risk of developing DD complications and mortality rate were assessed. Bivariate models were fitted.

RESULTS

One hundred hospitalised patients with DD (mean age 77.9 ± 10.6 years, 53 female patients) were included. Patients with higher MPI groups were more likely to develop DD complications. In particular, 12 (46.2%), 21 (52.5%), and 28 (82.4%) patients with complicated DD were distributed to the MPI 1, MPI 2, and MPI 3 groups (p = 0.0063), respectively. Two patients died in the MPI 1, 4 in the MPI 2, and 29 in the MPI 3 group, with mortality rates of 4.0 per 100 person-year (95% confidence interval [CI] 1.0-15.9), 5.6 (95% CI 2.1-15.0), and 89.2 (95% CI 62-130), respectively (log-rank test p < 0.001). In bivariate analysis, after adjustment for age >80 years, Charlson Comorbidity Index >4, DD complications, and the presence of thromboembolism, higher MPI group was independently associated with higher mortality. Those in the MPI 3 group experienced a greater risk of 1-year hospital readmission (p < 0.001).

CONCLUSION

MPI predicted mortality in patients with DD and also correlated with the risk of developing DD complications. Studies focussing on possible pathophysiological mechanisms between DD complications and MPI are needed.

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.

Incidence and prevalence of inflammatory bowel diseases in gastroenterology primary care setting

BACKGROUND

The incidence of inflammatory bowel diseases (IBDs) has markedly increased over the last years, but no epidemiological study has been performed in gastroenterology primary care setting. We describe the epidemiology of IBD in a gastroenterology primary care unit using its records as the primary data source.

METHODS

Case finding used predefined read codes to systematically search computer diagnostic and prescribing records from January 2009 to December 2012. A specialist diagnosis of Ulcerative colitis (UC), Crohn's disease (CD), inflammatory bowel disease unclassified (IBDU) or segmental colitis associated with diverticulosis (SCAD), based on clinical, histological or radiological findings, was a prerequisite for the inclusion in the study. Secondary, infective and apparent acute self-limiting colitis were excluded.

RESULTS

We identified 176 patients with IBD in a population of 94,000 with a prevalence 187.2/100,000 (95% CI: 160.6-217.0). Between 2009 and 2012 there were 61 new cases. In particular, there were 23 new cases of UC, 19 new cases of CD, 15 new cases of SCAD, and 4 new cases of IBDU. The incidence of IBD was 16.2/100,000 (95% CI 12.5-20.7) per year. The incidence per year was 6/100,000 (95% CI 3.8 to 8.9) for UC, 5/100,000 (95% CI 3.0-7.7) for CD, 4/100,000 (95% CI 2.3-6.5) for SCAD, and 1/100,000 (95% CI 0.3-2.6) for IBDU.

CONCLUSIONS

We assessed for the first time which is the prevalence and incidence of IBD in a gastroenterology primary care unit. This confirms that specialist primary care unit is a key factor in providing early diagnosis of chronic diseases.

Segmental colitis associated with diverticulosis: a 5-year follow-up

BACKGROUND AND AIMS

Literature data about the outcome of segmental colitis associated with diverticulosis (SCAD) are scarce. Our aim was to assess the clinical outcome of SCAD according to the type of disease.

PATIENTS/METHODS

Twenty-seven SCAD patients underwent a 5-year follow-up (13 males, 14 females; mean age, 63.71 years; range, 50-85 years). Eleven patients were affected by type A, eight by type B, four by type C and four by type D SCAD. During the follow-up, all type B, C, and D patients were under continuous medical treatment. Five type A patients refused any maintaining treatment, but accepted to undergo the clinical, endoscopic, and histological follow-up.

RESULTS/FINDINGS

Five type A patients taking therapy (83.33%), two type A not taking therapy (50%), all type C patients (100%), five type B patients (62.5%) and none of type D (0%) were under continuous remission at the end of the follow-up. All type D patients required further steroid course to obtain remission, and two patients required azathioprine to maintain remission. INTERPRETATIONS/CONCLUSIONS: SCAD B and D patients fail to maintain long-term remission, often requiring immunosuppressive treatment. SCAD A and C patients show a more benign course; however, long-term treatment guarantees longer remission also in those patients.

Absence of mucosal inflammation in uncomplicated diverticular disease

BACKGROUND

Uncomplicated diverticular disease is a common condition in patients older than 50 years. Symptoms are aspecific and overlapping with those of irritable bowel syndrome. Nowadays, patients are often treated with antinflammatory drugs (5-aminosalicilic acid).

AIM

Our purpose was to evaluate the presence of inflammation in the colonic mucosa of patients with symptomatic uncomplicated diverticular disease compared with subjects without diverticula.

METHODS

Endoscopic biopsies of colon from 10 patients with symptomatic uncomplicated diverticular disease and 10 from subjects without diverticula (controls) were taken. Specimens were homogenised and IL2, IL4, IL5, IL8, IL10, IL12p70, IL13, IFN gamma, TNF alfa (searchlight multiplex technique), TGF beta, transglutaminase type 2 and caspase 9 were measured. Histochemistry for transglutaminase type 2 and TUNEL were performed on the histological sections, in addition to morphologic evaluation, as markers of tissue remodelling and apoptosis. For statistical analysis Student's t test and Spearman correlation test were used.

RESULTS

No histological differences were detected between the patients with an uncomplicated diverticular disease and controls. Mean values of mucosal cytokines and of the other tested parameters did not show statistically significant differences between patients with uncomplicated diverticular disease and controls.

CONCLUSIONS

Even if based on a small number of patients, the study demonstrates the absence of inflammation in the mucosa of subjects affected by uncomplicated diverticular disease.