Expression of Bcl-2 and Bax in extrahepatic biliary tract carcinoma and dysplasia

Table 1 Expression of Bcl-2 and Bax in biliary tract carcinoma and dysplasia lesions

Lesions	Bcl-2 expression			Bax expression
	No. positive/tested	%	P	No. positive/tested	%	P
Bile duct	9/21	42.9	0.363	7/21	81.0	0.290
Ampulla of Vater	1/6	16.7		3/6	50.0
Invasive carcinoma	10/27	37.0	0.110	20/27	74.1	0.038a
Dysplasia	1/10	10.0		3/10	30.0
Normal	0/5	0		2/5	40.0

a: Further compared, it was shown that the difference of Bax expression between dysplasia and normal epithelium was not significant (P = 1.00), but Bax expression of carcinoma differed from that in dysplasia and normal tissues significantly (P = 0.012).