Abstract
The classification of appendiceal mucinous tumors is controversial, and a strategy of treatment has not yet been established. Here, we report a case of low-grade appendiceal mucinous neoplasm (LAMN) in a 78-year-old man hospitalized owing to abdominal pain. Abdominal CT showed cystic dilatation of appendix. We diagnosed appendiceal tumors and performed ileocecal resection with lymph node dissection. The appendix was swollen to 6 cm in diameter, and there was accumulating mucus within the lumen. The proximal end was invaginated into the cecum. The pathological diagnosis indicated LAMN. Recent research has recognized that LAMN is potentially malignant because of its nature as the precursor to disseminated pseudomyxoma peritonei. Therefore, appropriate surgical intervention with careful postoperative surveillance should be considered to achieve a successful long-term outcome.
