Daniel Ben-Mordechay: Portal Vein Thrombosis – Ultrasound Perspective
Daniel Ben-Mordechay, Chief Executive Officer at Orimed GTD, shared a post on LinkedIn:
“Portal Vein Thrombosis (PVT): Ultrasound Perspective
Portal vein thrombosis is a key cause of prehepatic portal hypertension, resulting from partial or complete obstruction of the portal vein lumen by thrombus formation.
Clinically, PVT may be asymptomatic, particularly in chronic settings, and is often detected incidentally during imaging follow-up in patients with underlying liver disease.
However, in acute cases, it may present with abdominal pain or signs related to mesenteric venous involvement.
From an imaging standpoint, multiple modalities can be used for diagnosis and characterization, including CT and MRI.
Nevertheless, ultrasound remains the first-line imaging modality due to its availability, safety, and real-time assessment capabilities.
Ultrasound findings:
- Gray-scale imaging
Acute PVT typically appears as echogenic or heterogeneous material within the portal vein lumen. The vein may appear distended compared to normal, especially in early stages.
- Color Doppler evaluation
The hallmark finding is partial or complete absence of flow within the portal vein. In some cases, reduced or altered flow patterns may be observed rather than complete absence.
- Chronic PVT considerations
In longstanding cases, cavernous transformation may develop, characterized by multiple serpiginous collateral vessels replacing the normal portal vein.
From a POCUS perspective, recognizing the combination of intraluminal material and absent or abnormal Doppler flow is critical for raising suspicion and prompting further evaluation.
Early identification has direct clinical implications, particularly in guiding anticoagulation, evaluating underlying etiologies, and preventing complications such as portal hypertension and bowel ischemia.”
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