Collaborative Stage

Note 1: Liver metastasis implies the presence of tumor inside the liver parenchyma as one or more nodules. Adherence to liver capsule, even if extensive, should not be considered distant metastasis. Code direct adherence to the liver in CS Extension code 570.
Note 2: Distant metastases are relatively rare in GISTs, but they are increasingly detected with sophisticated radiological studies. Tumor multiplicity, i.e. the presence of anatomically separate, multiple gastrointestinal primary tumors of various sizes, usually in the setting of neurofibromatosis type 1 or familial GIST syndrome, should not be considered intra-abdominal dissemination. Code the present of multiple tumors in SSF15.

Code	Description	TNM 7 Map	TNM 6 Map	SS77 Map	SS2000 Map
00	No; none	M0	NA	NONE	NONE
10	Distant lymph node(s), NOS	M1	NA	D	D
11	Rectosigmoid: Internal iliac (hypogastric) Obturator	M1	NA	RN	D
12	Other distant lymph node(s), including external iliac or common iliac	M1	NA	D	D
40	Distant metastases except distant lymph node(s) codes 10-12 Carcinomatosis	M1	NA	D	D
50	(40)+ any of [(10 or (12)] Distant lymph node(s) plus other distant metastases	M1	NA	D	D
60	Distant metastasis, NOS M1, NOS	M1	NA	D	D
99	Unknown if distant metastasis Distant metastasis cannot be assessed Not documented in patient record	M0	NA	U	U

CS Mets at DX