fig4
From: Diagnosis and treatment of biliary malignancies: biopsy, cytology, cholangioscopy and stenting
Figure 4. Diagnostic algorithm for malignant biliary stricture. US: Ultrasonography; CT: computed tomography; MRI/ MRCP: magnetic resonance imaging/magnetic resonance cholangiopancreatography; CBD: common bile duct; ERCP: endoscopic retrograde cholangiopancreatography; EUS: endoscopic ultrasound; FNA: fine needle aspiration; IDUS: intraductal ultrasound.
