[Fourteen Cases of Low-Grade Appendiceal Mucinous Neoplasm].

Low-grade appendiceal mucinous neoplasm(LAMN)is a rare disease. In consideration of consistency with the 2010WHO Classification, LAMNwas classified in the Japanese Classification of Colorectal Carcinoma 8th edition. The present study involved 14 patients with LAMNover a 5-year period. The preoperative diagnosis was made as mucocele of the appendix in 9 cases. Operative interventions included ileocecal resection in 6 cases(laparoscopic; 3 cases)and appendectomy in 8 cases (laparoscopic; 6 cases). Histopathologically, there was no LNpositive case. While adjuvant therapies were not administered in all cases, all patients remain alive without recurrence. The treatment strategy for LAMNhas not been established. Therefore, an adequate surgical method with careful postoperative surveillance should be considered.