Abstract:Objective To evaluate the therapeutic efficacy of medical antibiotic therapy, endoscopic minimally invasive treatment, and surgical intervention in patients with colonic diverticulitis.Methods A retrospective analysis was performed of 94 patients with colonic diverticulitis from January 2022 to June 2025 due to symptoms such as abdominal pain. Patients were categorized into a simple diverticulitis group (n = 43) and a colonic diverticulitis with peritonitis group (peritonitis group, n = 51). According to treatment modality, patients were further divided into a medical antibiotic treatment group (conservative treatment group), an endoscopic minimally invasive treatment group (endoscopic fecalith removal and hemoclip placement for hemostasis, endoscopic treatment group), and a surgical treatment group (partial colectomy, surgical treatment group). Clinical characteristics, length of hospital stay, hospitalization costs, and treatment outcomes were compared among groups.Results The incidence of abdominal pain was higher and the age was younger in the peritonitis group compared with the simple diverticulitis group. In the simple diverticulitis group, 31 received conservative antibiotic therapy, 11 underwent endoscopic minimally invasive treatment, and 1 underwent surgical resection. No significant differences were observed among the three treatment modalities in terms of therapeutic efficacy, short-term recurrence, or complication rates (P > 0.05). In the peritonitis group, all three treatment modalities were applied, and the effective rate was 100.00% in all three groups. There were no statistically significant differences in the incidence of complications or the recurrence rate within 3 months among the three treatment groups (P > 0.05); the median length of hospital stay was 6.00 days in the conservative treatment group, 5.50 days in the endoscopic treatment group, and 8.00 days in the surgical treatment group; hospitalization costs were significantly higher in the surgical treatment group than in the conservative and endoscopic treatment groups.Conclusion Medical antibiotic therapy is effective for patients with simple colonic diverticulitis, with a high treatment success rate. For patients with colonic diverticulitis complicated by peritonitis, both medical antibiotic therapy and endoscopic minimally invasive treatment involving fecalith removal and titanium clip closure achieve favorable clinical outcomes comparable to surgical treatment. However, surgical treatment is associated with higher hospitalization costs, longer hospital stays, and a risk of complications.