A schwannoma of the S1 dural sleeve was resected while the intact nerve fibers were presented using a microscope. Report of a case with early MRI findings. - Kobayashi,S.; Uchida,K.; Kukubo,Y.; Yayama,T.; Nakajima,H.; Inukai,T.; Nomura,E.; Baba,H. (Minim Invas Neurosurg, 2007)