Endoscopic ultrasonography confirmed recurrence of gallbladder cancer: a case report (with a video).

Biliary tract cancer is the most common biliary malignant tumor, which is considered to be a high-grade malignant tumor because of its frequent recurrence / metastasis[1]. Late recurrence of gallbladder cancer after operation is rare. We presented a case of recurrent cancer after radical resection of gallbladder cancer.