case_images: PMC6159251_01
case_images: Multiplanar contrast-enhanced multidetector CT images reveal a mass in the portal vein (*). Axial CT image (a) shows numerous collaterals around the heterogeneously enhancing mass (*). There is a rim of contrast around the mass (white arrowheads) indicating that the mass has an intraluminal origin rather than tumour invasion from adjacent structures. Corresponding coronal CT image (b) shows a sharp interface with the appearance of a "beak" (white arrowheads) between the opacified main portal vein and the mass (*).
case_images: bjrcr.20160125.g001.jpg
case_images: PMC6159251_01_bjrcr.20160125.g001.jpg
case_images: f1
case_images: On the portal venous phase, numerous collaterals were seen surrounding the mass with a sharp interface between the mass and opacified portion of the main portal vein at the porta hepatis giving the appearance of a "beak" (Figure 1).
case_images: Microscopic findings of the resected specimen showing the leiomyosarcoma arising from within the portal vein and confined in the lumen (hematoxylin-eosin, 200x magnification).
case_images: bjrcr.20160125.g002.jpg
case_images: PMC6159251_01_bjrcr.20160125.g002.jpg
case_images: f2
case_images: The final histological diagnosis was of a primary LMS of the portal vein (Figure 2).