Peri-appendiceal Abscess and Phlegmon in Acute Complicated Appendicitis Patients

Inclusion Criteria: * Patients who were aged ≥18 years, Patients who were clinically diagnosed with acute appendicitis, Patients who had a peri-appendiceal abscess or phlegmon on CT scan, Patients who opted to undergo immediate emergency surgery as their primary choice, Patients who refused conservative treatment first (antibiotic therapy and ultrasound/CT-guided drainage). Exclusion Criteria: * Patients younger than 18 years, Patients have a history of prior malignancies, Patients with diffuse peritonitis, Patients with incomplete clinical or pathological records.