Bilateral breast uptake demonstrated on FDG PET/CT scans in 3 male patients with hepatocellular carcinomas.

We reported 3 male patients with hepatocellular carcinoma who underwent FDG PET/CT for systemic survey before liver transplantation. All of their scans demonstrated obvious FDG uptake in bilateral breasts. These uptakes might be owing to gynecomastia caused by an increase in free estrogen related to the cirrhotic liver.