FDG hepatic superscan caused by massive breast cancer invasion.

A 46-year-old woman who was treated in the past for locally advanced breast cancer, presented with signs of acute liver failure. FDG PET revealed a massive hot liver with increased activity without any pathologic FDG uptake elsewhere in the body. Therefore, the term hepatic superscan was chosen because intense diffuse hepatic FDG uptake was seen in combination with a surprisingly low cardiac and in minor degree of low brain uptake, similar to the superscan pattern encountered in conventional skeletal scintigraphy. This very unusual finding was the indicator of extensive hepatic involvement caused by breast cancer.