The authors reply: Re: Yamamoto R, Sugiura T, Ashida R, Ohgi K, Yamada M, Otsuka S, and Uesaka K. Prognostic value of carbohydrate antigen 19‐9 and the surgical margin in extrahepatic Cholangiocarcinoma. Ann Gastroenterol Surg. 2022;6:307–315

• Ryusei Yamamoto,
• Teiichi Sugiura,
• Ryo Ashida,
• Katsuhisa Ohgi,
• Mihoko Yamada,
• Shimpei Otsuka,
• Katsuhiko Uesaka

Affiliations

Ryusei Yamamoto

Division of Hepato‐Biliary‐Pancreatic Surgery Shizuoka Cancer Center Shizuoka Japan

Teiichi Sugiura

Division of Hepato‐Biliary‐Pancreatic Surgery Shizuoka Cancer Center Shizuoka Japan

Ryo Ashida

Division of Hepato‐Biliary‐Pancreatic Surgery Shizuoka Cancer Center Shizuoka Japan

Katsuhisa Ohgi

Division of Hepato‐Biliary‐Pancreatic Surgery Shizuoka Cancer Center Shizuoka Japan

Mihoko Yamada

Division of Hepato‐Biliary‐Pancreatic Surgery Shizuoka Cancer Center Shizuoka Japan

Shimpei Otsuka

Division of Hepato‐Biliary‐Pancreatic Surgery Shizuoka Cancer Center Shizuoka Japan

Katsuhiko Uesaka

Division of Hepato‐Biliary‐Pancreatic Surgery Shizuoka Cancer Center Shizuoka Japan