Inclusion Criteria:  Patients of all ages who underwent emergency appendicectomy (either laparoscopic or open) for suspected acute appendicitis Patients of all ages who underwent partial ileo-caecectomy or right hemicolectomy for suspected acute appendicitis  Exclusion Criteria:  Patients who underwent elective interval appendicectomy for a previous appendiceal phlegmon Patients who underwent appendicectomy or right hemicolectomy for appendiceal tumours Patients who underwent diagnostic laparoscopy for suspected acute appendicitis, where the appendix was not removed