CT scan of the abdomen shows a large cystic mass in the right hemiabdomen showing negative (-10 HU) attenuation values.
At a more cranial level the lesion neighbours the right kidney, the medial border of the right liver lobe, the inferior vena cava and the head of the pancreas (Morison’s pouch).
CT guided percutaneous aspiration yielded 420 ml of yellowish fluid. After the procedure the cyst was no longer visible.
Electrophoretic analysis of the aspired fluid shows peaks of pre-beta-lipoproteins and chylomicrons. No neoplastic cells were found. Bacteriologic examination was negative.