Cathepsin E Is a Marker of Gastric Differentiation and Signet-Ring Cell Carcinoma of Stomach: A Novel Suggestion on Gastric Tumorigenesis

Maki Konno-Shimizu, Nobutake Yamamichi, Ken Ichi Inada, Natsuko Kageyama-Yahara, Kazuya Shiogama, Yu Takahashi, Itsuko Asada-Hirayama, Mitsue Yamamichi-Nishina, Chiemi Nakayama, Satoshi Ono, Shinya Kodashima, Mitsuhiro Fujishiro, Yutaka Tsutsumi, Masao Ichinose, Kazuhiko Koike