AFP and hepatocellular carcinoma: AFP levels were remarkably decreased after operation (15 ng/mL), and no residual tumors or distant metastases were observed on contrast enhanced computed tomography (CE-CT), indicating that the tumor was an AFP-producing gallbladder carcinoma rather than metastasis of HCC.<h4>Discussion</h4>Due to the similar developmental origin of the liver and gallbladder, gallbladder carcinoma could produce AFP in some cases.