PORTAL VEIN ANEURYSM: ULTRASOUND IDENTIFICATION.
Abstract
Portal vein aneurysm is a rare clinical entity with less than 50 published cases in the English literature. With the more frequent uses of radiological imaging modalities in the evaluation of abdominal complaints, this pathology will be more common than previously recognized. The radiologist must be aware of these aneurysms and their imaging features. We present two patients who were incidentally diagnosed with an extrahepatic portal vein aneurysm. The sonographic appearance of an anechoic saccular or fusiform vascular mass contiguous with the portal vein or its tributaries is diagnostic of a portal vein aneurysm. Etiology, clinical significance and management strategies for extrahepatic portal vein aneurysms are discussed.
Venous aneurysms seldom occur. secondary to the low velocity and low pressure flow state that exist in veins. They appear most frequently in the neck and in the lower limbs.' Aneurysm of the portal vein is the most common visceral venous aneurysm.’ Because they occur so infrequently, they may be confused with arterial aneurysms, pancreatic or hepatic cysts. Color duplex sonography provides an excellent mean of definitively diagnosing portal vein aneurysms and can be used as a noninvasive SEPT. - DEC. 2002. Volume VIII Number III means for follow-up evaluation.
We recently encountered two cases of extrahepatic portal vein aneurysm. Both lesions were incidentally detected by a routine sonographic examination.
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