Early bile duct cancer

Table 1 Publications on early bile duct cancers

Author	Yr	Depth of invasion		Number of early cancer	Total number of cholangiocarcinoma
		Mucosa	Fibromuscular
Tsunoda et al[5]	1989	3	5	8 (6%)	146
Yamaguchi[6]	1992		NC	7	NM
Mizumoto et al[7]	1993	4	10	14 (8%)	171
Bhuiya et al[8]	1993		NC	7 (10%)	70
Kurosaki et al[9]	1998		NC	7 (8%)	90
Tamada et al[10]	2001		NC	10 (18%)	55
Lim et al[11]	2006	11	10	23 (3%)1	742
Cha et al[4]	2006	16	45	61 (10%)	614

NC: not classified; NM: not mentioned.

¹Two cases were not included in the evaluation of depth of invasion.