Collection of Cancer Stage Data by Classifying Free-text Medical Reports

Table 1

Summary of the TNM Staging Protocol2

T: Primary Tumor	X	Primary tumor cannot be assessed
	0	No evidence of primary tumor
	is	Carcinoma in situ
	1,2,3,4	Increasing size and/or local extent of the primary tumor
N: Regional Lymph Nodes	X	Regional lymph nodes cannot be assessed
	0	No regional lymph node metastasis
	1,2,3	Increasing involvement of regional lymph nodes
M: Distant Metastasis	X	Distant metastasis cannot be assessed
	0	No distant metastasis
	1	Distant metastasis

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