Mechanism of benign biliary stricture: A morphological and immunohistochemical study

Table 1 Percentages of collagenous fiber area and EVCD in different groups after operation (%) (n = 5, mean±SD).

Group	Percentage of collagenous fiber area	EVCD
1st wk	54.38±3.86	58.23±4.56
3rd wk	69.26±5.24	70.67±3.32
3rd mo	78.06±4.13	81.42±3.74
6th mo	72.48±4.52	75.48±4.36

Significant difference between all groups (P<0.05).

Table 2 Expression of CD68, TGF-β1, α-SMA in healing of bile duct (n = 5, mean±SD).

Group	CD68	Positive cells (%)	TGF-β1	Positive cells (%)	α-SMA	Positivecells (%)
Normal	-	3.7±0.6	-～+	12.3±3.5	+	14.4±5.3
1st wk	++～+++	65.3±5.3a	+++	68.3±5.2a	++～+++	54.6±6.4a
3rd wk	++	42.2±4.2ab	+++	65.3±4.2a	+++	63.1±5.7a
3rd mo	++	45.1±6.2ab	++～+++	59.4±5.0a	+++	68.9±4.2a
6th mo	++	39.3±4.4ab	++	55.1±6.4a	++	51.4±5.7a

^aP<0.05, vs 1^stwk.^bP<0.01, vs Normal.