Diverticular Disease

Diverticular disease describes the spectrum of conditions arising from diverticula — small outpouchings of the colonic wall — ranging from asymptomatic diverticulosis to acute diverticulitis and its complications such as abscess, perforation, fistula, and stricture. Most diverticulitis is now managed without surgery; operative treatment is reserved largely for complicated disease and for selected patients with recurrent or persistent symptoms.

Definition

Diverticular disease is the clinical condition resulting from colonic diverticula, encompassing asymptomatic diverticulosis and symptomatic diverticulitis with its complications, including abscess, free perforation with peritonitis, fistula, obstruction, and bleeding.

Scope

This entry covers the spectrum from diverticulosis to complicated diverticulitis, the principles of distinguishing uncomplicated from complicated disease, the contemporary shift toward non-operative and selective management, and the surgical options for perforated or otherwise complicated disease. It is a reference description and does not provide treatment protocols or individualized advice.

Core questions

• How does diverticulosis differ from diverticulitis and its complications?
• Which presentations of diverticulitis can be managed without surgery?
• What surgical options exist for perforated diverticulitis, and how do they differ?
• When is elective resection considered after recovery from diverticulitis?

Key concepts

• Diverticulosis
• Acute diverticulitis
• Complicated versus uncomplicated disease
• Hinchey classification
• Hartmann's procedure
• Primary anastomosis
• Laparoscopic lavage
• Elective sigmoid resection

Mechanisms

Diverticula form where the colonic wall is relatively weak, classically at sites of vascular penetration, and are most common in the sigmoid colon; inflammation of a diverticulum (diverticulitis) can remain localized and uncomplicated or progress to abscess, free perforation with purulent or faeculent peritonitis, fistula, or stricture. The severity of perforated disease is commonly described by the Hinchey classification, which informs whether non-operative treatment, drainage, or resection is appropriate (Hall et al., 2020). For perforated diverticulitis with peritonitis, the surgical choice lies between resection with end colostomy (Hartmann's procedure) and resection with primary anastomosis; randomized data suggest primary anastomosis can be a safe alternative in selected patients with the advantage of fewer subsequent stoma-reversal operations (Oberkofler et al., 2012). Operative outcomes are graded by the Clavien-Dindo system (Clavien et al., 2009).

Clinical relevance

Diverticular disease is a common reason for acute surgical assessment and a frequent subject of elective surgical discussion, and the evolution toward selective, less aggressive management illustrates broader trends in surgical decision-making. This entry is educational and descriptive and is not a basis for individual diagnosis or treatment decisions.

Epidemiology

The prevalence of colonic diverticulosis rises steeply with age and is high in older populations of high-income countries, though only a minority of those affected ever develop diverticulitis; complicated disease requiring surgery is a smaller subset still, and rates of routine elective resection after uncomplicated diverticulitis have fallen as evidence favours selective management (Hall et al., 2020).

History

Diverticular disease became increasingly recognized through the twentieth century alongside changes in diet and ageing populations, and the Hinchey classification provided a durable framework for grading perforated disease. Surgical practice has shifted from frequent emergency resection with colostomy and from routine elective resection after recurrent attacks toward more selective, often non-operative management, supported by trial evidence on primary anastomosis and by contemporary guidelines.

Debates

Hartmann's procedure versus primary anastomosis for perforated diverticulitis

End colostomy (Hartmann's) has been the traditional safe option for perforated diverticulitis with peritonitis, but randomized evidence suggests resection with primary anastomosis is a reasonable alternative in selected patients, achieving more frequent restoration of bowel continuity; patient selection remains the key judgement.

Seminal works

• oberkofler-2012
• hall-2020

Frequently asked questions

What is the difference between diverticulosis and diverticulitis?

Diverticulosis is the presence of diverticula in the colon, often without symptoms, whereas diverticulitis is inflammation or infection of one or more diverticula, which can be uncomplicated or progress to complications such as abscess or perforation.

Does diverticulitis usually require surgery?

No. Most episodes, particularly uncomplicated ones, are managed without surgery; operation is reserved mainly for complicated disease such as perforation with peritonitis or for selected recurrent or persistent cases.