Collaborative Stage

Collaborative Stage for TNM 7 - Revised 06/22/2009 [ Schema ]

Extension Size Table

Note: This table documents the coding of AJCC-6 T and AJCC-7 T based on CS Extension and CS Tumor Size. When the appropriate extension code is 100, 200, or 300, the T category is assigned based on value of tumor size, as follows:

Tumor Size	T Code	Comment
000	ERROR	Tumor size 000 should only be used with Extension 950.
001	T1mi
002-005	T1a
006-010	T1b
011-020	T1c
021-050	T2
051-989	T3
990	T1mi
991	T1b
992	T1NOS
993-995	T2
996	T1NOS	Per downstaging rule
997	ERROR	Tumor size 997 should only be used with Extension code 050 or 070.
998	T3
999	TX