How are Doppler waveforms altered in PV thrombosis?
- In acute PV thrombosis, flow in the PV is markedly diminished or absent, with no Doppler waveform or color flow.
- Cavernous transformation of the PV, manifested by multiple tubular channels in the porta hepatis demonstrating Doppler and color flow with nonvisualization of the native PV, may develop within 12 months.
- Echogenic material representing thrombus is usually seen in the PV. An arterial waveform within the thrombus is highly specific for malignancy.
