Massive Myoepithelial Carcinoma Originating from the Submandibular Gland That Was Successfully Treated with Surgical Excision, Using a Part of the Lengthened Skin as a Local Flap oleh Ayato Hayashi, MD, Junkichi Yokoyama, MD, Rumiko Sato, MD, Hidekazu Yoshizawa, MD, Rica Tanaka, MD, Yuhei Natori, MD, Shinichi Ohba, MD, Yuki Fukumura, MD, Atsushi Arakawa, MD, Hiroshi Mizuno, MD