Peroral direct cholangioscopic-guided biopsy and photodynamic therapy using an ultraslim upper endoscope for recurrent hepatocellular carcinoma with intraductal tiny nodular tumor growth.

Peroral direct cholangioscopic-guided biopsy and photodynamic therapy using an ultraslim upper endoscope for recurrent hepatocellular carcinoma with intraductal tiny nodular tumor growth.