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Complete thrombosis of the portal vein. The thrombus itself cannot be visualized with sonography, but color Doppler reveals an absence of flow that is confirmed by pulsed Doppler findings.
Fig. 4 Trombosi completa della vena porta. Ecograficamente non è visualizzabile il trombo, ma vi è assenza di flusso al color-Doppler, confermata dal Doppler pulsato.
