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 SSF 15.

Code	Description	TNM 7 Map	TNM 6 Map	SS77 Map	SS2000 Map
00	No; none	M0	NA	NONE	NONE
08	Cecum, ascending, hepatic flexure and transverse colon: Superior mesentric lymph nodes only	M1	NA	RN	D
10	Distant lymph node(s) other than code 08 For all colon sites: Common iliac Distant lymph node(s), NOS External iliac Para-aortic Retroperitoneal For cecum, ascending colon, transverse colon, and hepatic flexure; Inferior mesenteric For splenic flexure, descending colon, and sigmoid colon: Superior mesenteric	M1	NA	D	D
40	Distant metastases except distant lymph node(s)(codes 08-10) Carcinomatosis	M1	NA	D	D
50	(40) + ((08) or (10)) 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