Diverticulitis: A Primer for Primary Care Providers
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Treatment of this common complication of diverticular disease is predicated on whether the presentation signals uncomplicated or complicated disease. While some uncomplicated cases require hospitalization, many are amenable to primary care outpatient, and often conservative, management. The longstanding practice of antibiotic treatment of uncomplicated cases is now considered a selective, rather than a routine, option.
Surgical treatment
Acute uncomplicated diverticulitis can be treated nonsurgically in nearly all patients, regardless of whether treatment occurs in the inpatient or outpatient setting. For complicated disease, however, approximately 15% to 25% of patients require surgery. The main indication for emergent or urgent surgical intervention is colonic perforation, which can lead to acute peritonitis, sepsis, and associated morbidity and mortality.29
The decision to perform elective surgery should be made case by case, not routinely—such as after a recurrent episode of diverticulitis, when there has been a complication, or in young patients (< 50 years).1,11 Immunocompromised patients (transplant recipients, patients taking steroids chronically, and patients with HIV infection who have a CD4 count < 200 cells/μL) can present with more virulent episodes of diverticulitis, have a higher incidence of perforation and fecal peritonitis, and have a greater likelihood of failure of nonsurgical management.1 Surgical intervention after the first episode of diverticulitis in these patients should therefore be considered.
In 2014, the American Society of Colon and Rectal Surgeons (ASCRS) recommended the laparoscopic Hartmann procedure (primary resection of the affected segment of colon, with end colostomy, followed by colostomy closure) as the gold standard for the treatment of acute perforated diverticular disease when surgery is required.46
,COLONOSCOPY AFTER DIVERTICULITIS
Although endoscopy is to be avoided during acute diverticulitis because of the risk for perforation, it is recommended six to eight weeks after the acute episode has resolved to rule out malignancy, inflammatory bowel disease, and colitis.1,3 Interestingly, in 2015, Daniels et al compared the colonoscopic detection rate of advanced colonic neoplasia in patients with a first episode of acute diverticulitis and in patients undergoing initial screening for colorectal cancer, and found no significant difference in the detection rate between the two groups.47 The authors concluded that routine colonoscopic follow-up after an episode of acute uncomplicated diverticulitis could be eliminated and that those patients could be screened according to routine guidelines.
Lau et al found a number of cancers and other significant lesions on colonoscopy performed after an episode of acute diverticulitis, with a 2.1% prevalence of colorectal cancer within one year after CT-proven diverticulitis, and an increase in the prevalence of abscess, local perforation, and fistula.48 Their study excluded patients who had had a colonoscopy within one year, however. They therefore recommended performing colonoscopy only for patients who have not had a recent colonoscopic exam. This recommendation is in accord with the most recent AGA and ASCRS guidelines. If a patient has had a recent colonoscopy prior to an acute episode of diverticulitis, the value of repeating the study after the episode resolves is unclear.
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