Diagnosis of biliary strictures after liver transplantation: Which is the best tool?

Table 2 Impact of indirect imaging tools on diagnosis of posttransplant biliary strictures.

	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)
US-biliary congestion all	63.9	91.0	92.0	60.6
-biliary congestion AST	68.4	91.0	86.7	76.9
-biliary congestion ITBL	58.8	91.0	83.3	74.1
US-biliary stenosis	0	0	0	0
US-concomitant biliary stones all	22.0	97.0	66.7	82.5
-stones AST	0	97	0	91.7
-stones ITBL	0	97	0	94
CT-biliary congestion all	63.6	57.1	70.0	50.0
-biliary congestion AST	40.0	57.1	40.0	57.1
-biliary congestion ITBL	83.3	57.1	62.5	80.0
CT-biliary stenosis	10	0	0	43.75
CT-concomitant biliary stones	0	0	0	0
MR-biliary congestion all	83.3	25.0	83.3	25.0
-biliary congestion AST	71.4	25.0	62.5	33.3
-biliaty congestion ITBL	88.9	25.0	72.7	50.0
MR-biliary stenosis	38.9	75	87.5	21.4
MR-correct localisation of stenosis	22	75	80	17.6
MR-concomitant biliary stones all	33.0	94	50	89
-stones AST	0	94
-stones ITBL	0	94

PPV, positive predictive value; NPV, negative predictive value.