Amylase level in extrahepatic bile duct in adult patients with choledochal cyst plus anomalous pancreatico-biliary ductal union

Table 3 Microscopic changes of choledochal cyst.

Parameter	Site	Grade	n (%)
Hyperplasia
	Gall bladder		14
		0	5 (36)
		1	2 (14)
		2	6 (43)
		3	1 (7)
	Bile duct		15
		0	9 (60)
		1	5 (33)
		2	0 (0)
		3	1 (7)
Inflammation
	Gall bladder		14
		0	0 (0)
		1	3 (21)
		2	7(50)
		3	4 (29)
	Bile duct		15
		0	2 (13)
		1	5 (33)
		2	7 (47)
		3	1 (7)

1: Hyperplasia grade. 0: Within normal limit. +1: Papillary epithelial growth, less than one-third. +2: Papillary epithelial growth, more than one-third and less than two-thirds. +3: Papillary epithelial growth, more than two-thirds. 2: Inflammation grade. 0: Within normal limit. +1: Infiltration of small number of lymphocytes. +2: Infiltration of moderate number of lymphocytes with multi-focal aggregates. +3: Extensive infiltration of lymphocytes with surface erosion.