Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Obara Shinsaku and Uchimoto Kazuaki and Koyama Fumikazu and Nakagawa Tadashi and Nakamura Shinji and Ueda Takeshi and Nishigori Naoto and Fujii Hisao and Tsutsumi Masahiro and Nakajima Yoshiyuki,Retroperitoneal Malignant Peripheral Nerve Sheath Tumor in the Pelvic Cavity without Neurofibromatosis I,The Japanese Journal of Gastroenterological Surgery,0386-9768,The Japanese Society of Gastroenterological Surgery,2014,47,2,156-162,https://cir.nii.ac.jp/crid/1390282679895263744,https://doi.org/10.5833/jjgs.2013.0121