An unusually large liver lipoma.

Liver lipoma is an extremely rare tumor. Its nature and behavior is not well known since available information is based mostly on individual case reports. This report presents a case of liver lipoma mimicking malignant liver tumor. The patient was 72-year female with 5-year history of right upper abdominal quadrant pain. Diagnostic work-up revealed a large liver tumor mass, suspicious of malignancy. However, patohistological analysis found it to be lipoma. Because of extremely low incidence of liver lipoma, especially large ones, appropriate diagnostic work-up is very important for its differentiation from malignant tumors.