Imaging diagnosis of pancreato-biliary diseases: A control study

Table 1 Pancreato-biliary diseases (n = 82)

Pancreato-biliary diseases	No. of cases
Cholelithiasisa	38
Gallbladder stone	14
Intrahepatic bile duct stone	7
Choledocholithiasis	17
Pancreato-biliary tumorb	34
Gallbladder carcinoma	6
Cholangiocarcinoma	9
Ampullary carcinoma	3
Pancreatic head carcinoma	11
Bile papilla carcinoma	5
Other diseases	10
Bile duct injury	2
Choledochal cyst	2
Sclerosing cholangitis	2
Chronic pancreatitis	4

^aGallbladder stone mixed with intra-or extra-hepatic stone 15, Mirizzi syndrome 2;

^bHepatic invasion or metastasis 5, lymphadenectasis 3.

Table 2 Accuracy of pancreato-biliary obstruction level (%) by different imageological methods

Level	Intra-hepatic	Extra-hepatic	Main pancreatic	Total
B-US	100.0 (8/8)	81.7 (49/60)	90.5 (19/21)	85.4 (76/89)
CT	100.0 (4/4)	93.0 (40/43)	100.0 (19/19)	95.5 (63/66)
ERCP/PTC	100.0 (5/5)	96.7 (29/30)	100.0 (8/8)	97.7 (42/43)
MRCP	100.0 (8/8)	100.0 (60/60)	100.0 (21/21)	100.0 (89/89)

Table 3 ROC analysis of pancreato-biliary obstruction

	ERCP/PTC (n = 40)	MRCP (n = 82)	MRCP + MRI (n = 82)
True-positive	14	22	28
True-negative	19	39	45
False-positive	3	9	3
False-negative	4	12	6
Sensitivity (%)	77.8	64.7	82.3
Specificity (%)	86.4	81.2	93.8
Accuracy (%)	82.5	74.4	89.0
AZ Values ± SD	0.9281 ± 0.0455	0.8833 ± 0.0400	0.9687 ± 0.0168

Table 4 Accuracy of diagnosis of obstructive causes (%)

	B-US	CT	ERCP/PTC	MRCP	MRCP+MRI
Cholelithiasis
Gallbladder stone	71.4	75.0	80.0	78.5	92.9
Intrahepatic bile duct stone	85.7	100.0	100.0	71.4	85.7
Choledocholithiasis	52.9	63.6	87.5	88.2	94.1
Pancreato-biliary tumor
Gallbladder carcinoma	50.0	75.0	60.0	50.0	66.7
Cholangiocarcinoma	33.3	75.0	83.3	77.8	88.9
Ampullary carcinoma	33.3	50.0	100.0	66.7	66.7
Pancreatic head carcinoma	63.6	81.8	100.0	90.9	100.0
Bile papilla carcinoma	40.0	66.7	100.0	60.0	80.0
Other diseases
Bile duct injury	50.0		100.0	100.0	100.0
Choledochal cyst	100.0	100.0	100.0	100.0	100.0
Sclerosing cholangitis	0	50.0	0	0	50.0
Chronic pancreatitis	75.0	75.0	100.0	50.0	75.0
Total	57.3	73.7	85.0	75.6	87.8