Concomitant Case of Intraductal Papillary Mucinous Neoplasm of the Pancreas and Functioning Pancreatic Neuroendocrine Tumor (Vasoactive Intestinal Polypeptide-Producing Tumor): First Report. Issue 6 (July 2016) - Ishizu, Shoko; Setoyama, Takeshi; Ueo, Taro; Ueda, Yoshihide; Kodama, Yuzo; Ida, Hiroshi; Kawaguchi, Yoshiya; Yoshizawa, Akihiko; Chiba, Tsutomu; Miyamoto, Shin'ichi