A case of long-term survival treated with three metastasectomies and two subsequent adjuvant nivolumab therapies for recurrent malignant melanoma of the esophagus oleh Keita Hanada, Shigeru Tsunoda, Motoo Nomura, Shintaro Fujimura, Yojiro Yutaka, Tatsuto Nishigori, Shigeo Hisamori, Hisatsugu Maekewa, Nobuaki Hoshino, Atsushi Itami, Eiji Tanaka, Kazutaka Obama