Diagnostic accuracy for intraductal ultrasound (IDUS), bile cytology, and percutaneous transhepatic cholangioscopy (PTCS)-guided biopsy
Diagnostic accuracy for intraductal ultrasound (IDUS), bile cytology, and percutaneous transhepatic cholangioscopy (PTCS)-guided biopsy
IDUS (percent)
Cytology (percent)
PTCS (percent)
Sensitivity
89*
64
93*
Specificity
50
93¶
100¶
Positive predictive value
96
100
100
Negative predictive value
100Δ
63
87
Accuracy
76
74
95◊
IDUS: intraductal ultrasound; PTCS: percutaneous transhepatic cholangioscopy. * p<0.05 versus cytology. ¶ p<0.05 versus IDUS. Δ p<0.05 versus cytology. ◊ p<0.05 versus IDUS and cytology.
Data from: Tamada K, Ueno N, Tomiyama T, et al. Gastrointest Endosc 1998; 47:341.
