Radiation Oncology/Carcinoid/Appendix

Appendiceal Carcinoid For other carcinoid tumors, see Carcinoids Staging Was added as a separate classification starting with the 7th edition of the AJCC Staging Manual. Carcinoids were not previously classified by the AJCC. There is a separate staging system for carcinomas arising within the appendix. Carcinoid tumors arising in other segments of the gastrointestinal tract are staged separately. AJCC 7th Edition (2009) Primary Tumor T1 - 2 cm or less T1a - 1 cm or less T1b - >1 cm and 2cm or less T2 - >2 cm and 4 cm or less, or with extension to the cecum T3 - >4 cm, or with extension to the ileum T4 - directly invades other adjacent organs or structures (e.g., abdominal wall, skeletal muscle; penetration of the mesoappendix is not included) Regional Lymph Nodes N0 - none N1 - yes Distant Metastasis M0 - none M1 - yes Stage Grouping I - T1 N0 II - T2-3 N0 III - T4 or N1 IV - M1