A rare case of hepatocellular carcinoma with bile duct invasion diagnosed by peroral cholangioscopy by Risako Ito, MD, Masanori Kobayashi, MD, PhD, Kazuo Ohtsuka, MD, PhD, Minoru Tanabe, MD, PhD, Ryuichi Okamoto, MD, PhD

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The Double-Max method: a novel method for gallbladder epithelial biopsy by Shun Fujiwara, MD, Masanori Kobayashi, MD, PhD, Kazuo Ohtsuka, MD, PhD, Minoru Tanabe, MD, PhD, Ryuichi Okamoto, MD, PhD

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A convenient and reliable method for endoscopic mapping biopsy of cholangiocarcinoma using a double-lumen cytology device by Masanori Kobayashi, MD, PhD, Shomei Ryozawa, MD, PhD, Kazuo Ohtsuka, MD, PhD, Minoru Tanabe, MD, PhD, Ryuichi Okamoto, MD, PhD

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