Diverticulitis Management

Clinical Presentation and Diagnosis

The American Gastroenterological Association recommends that diverticulitis typically presents with left lower quadrant abdominal pain, accompanied by fever, changes in bowel habits, nausea, and leukocytosis 1, 2
Clinical suspicion alone is correct in only 40-65% of cases, making imaging essential for confirmation 1, 3
CT scan of the abdomen and pelvis with oral and intravenous contrast is the gold standard diagnostic test, with 95-99% sensitivity and 99-100% specificity 1

For immunocompetent patients with mild uncomplicated diverticulitis, antibiotics are NOT routinely necessary—observation with supportive care is first-line therapy 5, 4
Reserve antibiotics for patients with high-risk features, such as immunocompromised status, clinical indicators, patient factors, or CT findings 5, 4
The American College of Gastroenterology recommends outpatient oral therapy for 4-7 days for immunocompetent patients, with first-line treatment being ciprofloxacin plus metronidazole 4

All patients with complicated diverticulitis require hospitalization, IV antibiotics, and surgical consultation 4
Small abscesses (<4-5 cm) can be treated with IV antibiotics alone, while large abscesses require percutaneous CT-guided drainage plus IV antibiotics 4

A high-quality diet with high fiber intake (>22.1 g/day) from fruits, vegetables, whole grains, and legumes can help prevent recurrence 5, 2, 4, 7
Regular vigorous physical activity, achieving/maintaining normal BMI, smoking cessation, and avoiding NSAIDs can also help prevent recurrence 2, 4, 5, 7

Elective sigmoidectomy should be discussed in patients with ≥3 episodes within 2 years, persistent symptoms, history of complicated diverticulitis, or significant quality of life impairment 4
The DIRECT trial demonstrated significantly better quality of life at 6 months and 5 years after elective surgery compared to conservative management 4

Immunocompromised patients require lower threshold for CT imaging, antibiotic treatment, and surgical consultation, and may present with milder signs despite more severe disease 1, 4
Elderly patients (>65 years) require antibiotic therapy even for localized complicated diverticulitis, and age >80 years is an independent indication for antibiotics in uncomplicated diverticulitis 4