Epithelial tumours of the appendix

Epithelial tumours of the appendix

Epithelial neoplasms are found in 0.6% of appendicectomy specimens. Numerous classification systems have been proposed, leading to much confusion and di ffi culty when comparing treatment modalities and outcomes. Following a modified Delphi consultation process, a group of interna tional experts proposed an updated classification system for appendiceal epithelial neoplasms. Tumours may be classified as mucinous or non-mucinous (intestinal type) and according architectural features to the degree of cytological atypia and (infiltrative versus pushing invasion) ( Table 76.3 ).