Abstract

Although venous abnormalities of the portal system have been thoroughly investigated in literature, an aneurysm of the portal vein is especially uncommon in clinical practice in Taiwan. We investigated a 73-year-old male patient who complained of malaise, fatigue, and abdominal discomfort for three months. Abdominal ultrasound at O.P.D. demonstrated that the patient has a large anechoic area at the bifurcation of portal vein with turbulent flows inside. Therefore he was admitted for further study. A number of examinations including CT scanning, Color Doppler ultrasound, and angiography were conducted, and all proved the abnormality to be a portal vein aneurysm. Portal vein aneurysms (PVAs) may be intrahepatic or extrahepatic, and their origin may be congenital or acquired. Acquired lesions are associated with trauma, degenerative changes or liver disease. Portal vein aneurysms. if large, are likely to give rise to symptoms of duodenal compression, common bile duct obstruction, and chronic portal hypertension. Ultrasound is the most common and easiest method for diagnosing aneurysms of the portal system. Managements of PVAs usually include observation, resection, thrombectomy, or portal venous decompression.

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