Primary Malignant Melanoma of the Esophagus Treated with Surgical Resection at an Early Stage. - Yoneda, Akira; Ogata, Ryosuke; Ryu, Shintaro; Yoshino, Kyohei; Fukui, Saeko; Ikeda, Takahiro; Kitasato, Amane; Sugiyama, Nozomu; Takeshita, Hiroaki; Minami, Shigeki; Ito, Masahiro; Kuroki, Tamotsu (Case Reports in Gastroenterology, 2024)