Intrahepatic Portal Vein Aneurysm : An Unusual Entity

A 48-year-old woman was referred for abdominal ultrasonography (US) examination as a part of diagnostic workup for abdominal pain. The patient was nondiabetic and nonhypertensive and reported no history of any other chronic disease. There was no history of hematemesis, jaundice or liver disease.Various blood tests, including routine hematologic and liver function tests, were within the reference range.There was no history of previous trauma or surgical intervention. Physical examination of the patient was unremarkable except for mild abdominal tenderness.Conventional gray scale and color doppler US examination revealed a well-defined fusiform dilatation of the right and left branches of the portal vein without thrombosis or calcification (Figure 1A).On spectral examination nonpulsatile, monophasic, turbulent venous flow was seen in the aneurysm (Figure 1A). The sizes of the lesions were 43x31 mm and 13x12 mm. Abdominal computed tomography (CT) was performed to rule out any other associated abnormality,and confirmed the US findings.Two intrahepatic portal vein aneurysm was also detected on CT imaging with no evidence of thrombosis (Figure 2). As the portal vein aneurysm was asymptomatic and discovered incidentally, routine follow-up was recommended for this condition.