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

Table 1 Clinical features of choledochal cyst with APBDU.

Parameter	n (%)
Age (yr)	15
2029 yr	3 (20)
3039 yr	6 (40)
4049 yr	4 (27)
>50 yr	2 (13)
Sex	15
Male	3 (20)
Female	12 (80)
Symptom at onset	15
Indistinct	0 (0)
Jaundice	0 (0)
Abdominal pain	12 (80)
Abdominal pain with jaundice	3 (20)
Size of cyst	15
≤4 cm	8 (53)
>4 cm	7 (47)
Type of choledochal cyst	15
Type I	8 (53)
Type IV	7 (47)
Type of APBDU	15
Choledocho-pancreatic type	14 (93)
Pancreatico-chole dochal type	1 (7)
Combined biliary disease	8
Gall bladder stone	2 (13)
Bile duct stone	4 (27)
Gall bladder cancer	1 (7)
Bile duct cancer	1 (7)

Table 2 Amylase level in bile duct and gall bladder of choledochal cyst.

Parameter	Site	n	Range (IU/L)	Mean±SD
Amylase
	Gall bladder	10	11500–212000	73148±65244
	Bile duct	11	11500–212000	85345±59660
Lipase
	Gall bladder	8	14400–117000	52175±33791
	Bile duct	8	6000–159000	49375±51058

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.