Clinical Course and Autopsy Findings of a Patient with Clival Chordoma Who Underwent Multiple Surgeries and Radiation during a 10-Year Period - Tamaki, Masashi; Aoyagi, Masaru; Kuroiwa, Toshihiko; Yamamoto, Masaaki; Kishimoto, Seiji; Ohno, Kikuo (Skull Base, 2007)