Duplex Doppler ultrasound in the diagnosis of cavernous transformation of the portal vein

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Abstract
Duplex Doppler ultrasound scans were performed in 10 patients with proven cavernous transformation of the portal vein. All cases exhibited absence of the normal portal vein lumen with replacement by numerous tortuous vessels. Doppler studies revealed a characteristic "flat" waveform with a reduction in the time averaged velocity to less than 8 cm/s which is well below the normal range. The combination of real-time and Dopper ultrasound enabled an accurate diagnosis to be made in all cases.

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