Late diagnosis of Low-Grade Appendiceal Mucinous Neoplasm (LAMN) from an incidental finding

a case report

Abstract

Low-grade appendiceal mucinous neoplasm (LAMN) is a rare epithelial tumor characterized by mucin accumulation and progressive dilation of the vermiform appendix. In cases of appendiceal wall rupture, it may lead to severe complications. Its nonspecific or asymptomatic nature can hinder preoperative diagnosis. When confined to the appendix, the appropriate treatment is surgical resection. We report the case of a 59-year-old man with a cystic lesion in the right iliac fossa detected four years before definitive treatment. The patient underwent videolaparoscopic resection, and histological examination confirmed the diagnosis of LAMN. The postoperative course was satisfactory.