Table 2. Operative Interventions in the Group Receiving Follow-up Treatment and Magnetic Resonance Imaging.

Patient Sex/Age, y	Reason for Intervention	Intervention	Time to Intervention, d	Histological Findings
M/59	Recurrent acute symptoms	Emergency operation	183	Acute appendicitis
M/59	Recurrent acute symptoms	Emergency operation	329	Periappendicular abscess and adenocarcinoma
M/46	Recurrent acute symptoms	Interval appendectomy after conservative treatment	303	Reactive changes
M/47	Recurrent acute symptoms	Interval appendectomy after conservative treatment	258	Subacute appendicitis
M/59	Recurrent acute symptoms	Emergency operation	18	Periappendicular abscess and LAMN
M/61	Recurrent acute symptoms	Emergency operation	330	Appendicitis and mucinous cystadenoma of the appendix
M/55	Recurrent acute symptoms	Emergency operation	189	Appendicitis and goblet cell carcinoid tumor
F/58	Tumor suspicion on follow-up MRI	Elective operation	199	Sessile serrated adenoma
F/53	Metastasized tumor on follow-up MRI	Palliative operation after oncologic treatment	332	Cecal adenocarcinoma and sessile serrated adenoma of the appendix
F/53	Tumor suspicion on follow-up MRI	Elective operation	96	Chronic appendicitis

Abbreviations: LAMN, low-grade appendiceal mucinous neoplasm; MRI, magnetic resonance imaging.