A case of Cowden disease with a germline mutation in exon5 of PTEN gene diagnosed based on typical esophageal multiple polypoid lesions observed on a medical checkup

Noriko Sawamura, Naohiko Harada, Eikichi Ihara, Kana Kakigao, Makiko Sugi, Kazuhiro Haraguchi, Takahiro Mizutani, Tsuyoshi Yoshimoto, Ken Kawabe, Nobuyoshi Fukushima, Kunitaka Fukuizumi, Makoto Nakamuta, Rie Yoshimura, Kazuhiko Nakamura