Focal intrahepatic strictures: A proposal classification based on diagnosis-treatment experience and systemic review

Figure 4 Multidetector-row computed tomography, magnetic resonance imaging, ultrasound, and endoscopic retrograde cholangiopancreatography images of patient No. 4. A: The orange arrow in the computed tomography scan image shows dilated B4; B and C: T1- (B) and T2-weighted (C) magnetic resonance imaging scans show low and high signals in B4, respectively; D: The ultrasound shows a 1.0 cm × 1.0 cm mass-like high-echo lesion in B4 (orange arrow); E and F: Endoscopic retrograde cholangiopancreatography with SpyGlass failed to enter B4 but detected small stones and batt-like exudate in the peripheral part of the left hepatic duct.