Arterial aneurysms are more common than visceral venous aneurysms. Portal vein aneurysms being the most common type of visceral venous aneurysms. Here, we present an 18-year-old young woman with thalassaemia major, who presented with headache, palpitation, shortness of breath and a recent increase in blood transfusion rate. On clinical examination, she had hepatosplenomegaly. Ultrasonography revealed hepatosplenomegaly with fusiform dilatation of extrahepatic portal vein, which was confirmed to be portal vein aneurysm on contrast enhanced CT. Though portal vein aneurysms were previously thought to be rare, recently they are increasingly diagnosed with the use of cross-sectional imaging. Recognition of this finding can help to avoid potential confusion with other periportal cystic masses of different aetiologies, especially on sonography.
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