Portal Vein Aneurysm Mimicking a Liver Nodule

Aneurisma da Veia Porta Simulando um Nódulo Hepático Palavras Chave Veia porta · Aneurisma · Nódulo hepático A 67-year-old woman with diabetes mellitus and arterial hypertension was referred to our outpatient clinic to further clarify a 3-cm nodule of the caudate lobe in an apparently noncirrhotic liver detected on abdominal ultrasound which was performed due to abdominal bloating. In order to reevaluate the nodule and due to its better availability, an abdominal Doppler ultrasound was performed in first instance, revealing a normal liver and a 38 × 28 mm nodular hypoechoic lesion with posterior acoustic enhancement located between the left lobe of the liver and the pancreatic head, apparently adjacent to the portal vein trunk, with positive Doppler sign (Fig. 1). [...]the lesion was considered to be of vascular nature, and as the patient refused magnetic resonance imaging (MRI) due to claustrophobia, an abdominal computed tomography (CT) scan was performed, describing a normal liver and a portal vein trunk aneurysm with a 35-mm diameter, without thrombosis or compression of adjacent structures (Fig. 2).