Intraductal papillary cholangiocarcinoma with aneurismal dilation: A case of the mimicking abscess

A case of cystic intraductal papillary cholangiocarcinoma is presented. A 58-year-old male patients presented with fever, chills, epigastric and right upper quadrant pain for 15 days. Clinically and radiologically, he was diagnosed as having liver abscess. After ultrasonography and abdominal computed tomography were taken, percutaneous drainage was performed and pus was drained. Computed tomography revealed a huge, multiloculated, septated cystic lesion in the right love of the liver. On the pathologic exam, the cysteic lesion was an aneurismally dilated tumor, which spread diffusely and contiguously along the intrahepatic bile duct and microscopically the lesion was composed of a single layer of tall columnar tumor cells with short intraluminal papilary projections. We present the unusual case of intraductal papillary cholangiocarcinoma with aneurismal dilation and with superimposed infection.