Axitinib for preoperative downstaging of renal cell carcinoma with sarcomatoid differentiation and direct invasion of the duodenum and inferiorvena cava: a case report. - Hideo Yuki; Takao Kamai; Keiichi Kubota; Hideyuki Abe; Daisaku Nishihara; Tomoya Mizuno; Akinori Masuda; Hironori Betsunoh; Masahiro Yashi; Yoshitatsu Fukabori; Ken-Ichiro Yoshida (OncoTargets & Therapy, 2014)