A practical approach for diagnosis of appendiceal mucinous neoplasms

Classification of appendiceal mucinous neoplasms remains controversial, and while multiple classification systems have been proposed, no single system is universally utilized. A recent consensus by the Peritoneal Surface Oncology Group International (PSOGI) provides clear diagnostic criteria for appendiceal mucinous neoplasms and their corresponding risk for pseudomyxoma peritonei. Here, we briefly review appendiceal mucinous neoplasms and associated risk for pseudomyxoma peritonei, and discuss the diagnostic difficulties, our approach, and the reporting guidelines proposed.