MRI findings of the tethered cord: 1) Thecord extended as low as to the level below L_4 and ares situated at the posteriorpart of the thecal sac.

• 脊髓低位的MRI表现为:脊髓偏于硬膜囊后部从胸段延续到L_4水平以下,无脊髓圆锥膨大;