Clinical bottom line
Current evidence suggests that surgical management of diverticulitis, particularly in acute complicated cases with peritonitis, may include either resection (e.g., Hartmann procedure) or less invasive approaches such as laparoscopic lavage. The DILALA trial demonstrated that laparoscopic lavage can be a feasible alternative to resection in selected patients, potentially reducing morbidity without compromising short-term outcomes. However, resection remains the standard for recurrent or complicated diverticulitis where source control is essential. Individualized decision-making based on disease severity, patient comorbidities, and surgical risk is critical, as evidence comparing long-term outcomes of resection versus non-resection approaches remains limited (Haglind et al., 2012; Deleon et al., 2016).
What the evidence shows
The DILALA randomized controlled trial (Haglind et al., 2012) compared laparoscopic lavage to Hartmann’s procedure in patients with acute diverticulitis and purulent peritonitis. Results indicated similar rates of postoperative complications and mortality, with lavage associated with shorter operative times and hospital stays. However, some patients required subsequent resection due to persistent or recurrent infection.
Deleon et al. (2016) reviewed outcomes of low anterior resection for diverticulitis, emphasizing that resection provides definitive management in recurrent or complicated disease but carries risks of anastomotic leak and stoma formation.
While not directly addressing diverticulitis, Lim et al. (2027) discuss surgical decision-making between drainage and resection in pancreatic cystic lesions, underscoring the importance of balancing invasiveness and disease control—principles applicable to diverticulitis management.
Other references in the vetted list focus on surgical approaches in different diseases (e.g., brain metastases, hepatocellular carcinoma) and thus do not inform diverticulitis management.
Caveats and uncertainty
The DILALA trial’s follow-up duration was limited, and long-term recurrence rates after lavage remain uncertain.
Patient selection criteria for laparoscopic lavage are restrictive; it is not suitable for fecal peritonitis or hemodynamically unstable patients.
Comparative data on quality of life, functional outcomes, and cost-effectiveness between resection and non-resection approaches are sparse.
Heterogeneity in diverticulitis severity and comorbidities complicates generalization of trial results.
There is a lack of large-scale, multicenter randomized trials comparing elective resection versus conservative management after initial diverticulitis episodes.
How this may change practice
Surgeons may consider laparoscopic lavage as a less invasive alternative in carefully selected patients with purulent peritonitis from diverticulitis, potentially reducing operative morbidity.
Resection remains indicated for patients with fecal peritonitis, recurrent episodes, or complicated disease not amenable to lavage.
Shared decision-making incorporating patient preferences, surgical risk, and local expertise is essential.
Further research is needed to clarify long-term outcomes and optimal timing of surgery in diverticulitis.
Multidisciplinary collaboration with gastroenterologists and radiologists can refine patient selection and perioperative care.