Kiyonaga, M.; Matsumoto, S.; Mori, H.; Yamada, Y.; Takaji, R.; Hijiya, N.; Yoshizumi, F.; Aramaki, M. Pancreatic Neuroendocrine Tumor With Extensive Intraductal Invasion of the Main Pancreatic Duct: A Case Report. JOP. J Pancreas (Online) 2014, 15, 497-500.