[MR imaging of intraspinal tumor--new extradural sign].
D000328:Adult; D000368:Aged; D003937:Diagnosis, Differential; D004824:Epidural Space; D005260:Female; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D008875:Middle Aged; D009455:Neurofibroma / Q000175:diagnosis*; D013120:Spinal Cord Neoplasms / Q000175:diagnosis*