Stage		Pathologic finding	Mean survival (%)
A		Cancer is limited to the muscular mucosa and submucosa.	90
B			60 to 75
	B1	Cancer extends into but not through the muscular mucosa.
	B2	Cancer extends through the muscle but does not involve lymph nodes.
C
	C1	Cancer is contained within the confines of the bowel wall and involves lymph nodes.
	C2	Cancer extends through the bowel wall and involves lymph nodes:
		One positive node	69
		Six or more positive nodes	27
D		Cancer has metastasized to liver, bone or lung.	5