Metastatic melanoma of the gallbladder. - Yukihisa Takayama; Yoshiki Asayama; Kengo Yoshimitsu; Hiroyuki Irie; Tsuyoshi Tajima; Masakazu Hirakawa; Kousei Ishigami; Daisuke Kakihara; Atsushi Sugitani; Yoichi Moroi; Takashi Eguchi; Hiroshi Honda (Comput. Medical Imaging Graph., 2007)