title: Perihilar cholangiocarcinoma: A much needed but imperfect new staging system.
abstract: A new staging system for perihilar cholangiocarcinoma has recently been proposed to standardize the reporting of this intractable disease. However, the system has several flaws; thus, many revisions are needed before a registry can be established that uses this system.
authors.affiliation: Department of Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Japan. nagino@med.nagoya-u.ac.jp
authors.forename: Masato
authors.initials: M
authors.lastname: Nagino