Sarcomatoid transformation is a rare but well documented change that may occur in intrahepatic cholangiocarcinomas.We report a tumor of this type to illustrate the difficulties in properly diagnosing cho- langiocarcinoma when only the sarcomatous compo- nent is sampled by transcutaneous needle biopsy. The proper diagnosis of the tumor was suggested by finding the expression of cytokeratin 7 in the sarcomatous spindle cells. The surgically resected tumor comprised a spindle cell sarcomatous and an adenocarcinomatous component accounting for approximately 30% and 70% of the total tumor mass respectively