A Schwannoma of the S1 Dural Sleeve was Resected while the Intact Nerve Fibers were Preserved Using a Microscope. Report of a Case with Early MRI Findings - Kobayashi, S; Uchida, K; Kokubo, Y; Yayama, T; Nakajima, H; Inukai, T; Nomura, E; Baba, H (min - Minimally Invasive Neurosurgery, 2007)