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Portal and systemic venous gas in a patient after lumbar puncture

D Karaosmanolu, MD S Ö Oktar, MD M Araç, MD and G Erba, MD

Gazi University, School of Medicine, Department of Radiology, 06510, Beevler-Ankara, Turkey

View larger version (41K): [in a new window]   Figure 1. 19-year-old male with gas in portal and systemic venous system. (a) Grey scale ultrasound reveals gas bubbles in the right main portal vein demonstrating the string of pearls sign. (b) Ultrasound images show the hyperechogenic appearance of the liver parenchyma due to gas bubbles in the peripheral venous structures (short arrows). Also note air bubbles in the lumen of inferior vena cava and hepatic veins.

View larger version (79K): [in a new window]   Figure 2. (a) Helical CT scan shows gas bubbles in the spinal canal (straight arrow). (b) Helical CT scan shows gas bubbles in the peripheral venous structures of the liver (arrowheads). (c) Helical CT scan obtained at the level of the porta hepatis shows gas in the left main portal vein (straight arrow).