Wilson D A, Prince J R
Magnetic Resonance Center, Oklahoma Medical Center, Oklahoma City 73126.
AJR Am J Roentgenol. 1989 May;152(5):1029-32. doi: 10.2214/ajr.152.5.1029.
This retrospective study was designed to determine the location of the conus medullaris in normal children by reviewing a series of MR images of the lumbar spine. The study group consisted of 184 children ranging in age from newborn to 20 years who had a normal conus level as reported by the radiologist of record. The range of conus levels for the entire group of normal children was T12 to L3. The range for the 0-2-year-old group was T12 to L2-L3 with an average of L1-L2. The range of conus levels for the 19-20-year-old group was L1 to L2 with an average of L1-L2. We conclude that the conus medullaris does not ascend throughout childhood as stated by previous authors but attains the adult level sometime during the first few months of life. A conus level at L2-L3 or above should be considered normal at any age. A conus level at L3 is indeterminate, since it is possible for a normal or a tethered conus to be located at this level.
这项回顾性研究旨在通过回顾一系列腰椎磁共振成像（MR）来确定正常儿童脊髓圆锥的位置。研究组由184名年龄从新生儿到20岁的儿童组成，记录的放射科医生报告其脊髓圆锥水平正常。正常儿童的整个组脊髓圆锥水平范围为T12至L3。0至2岁组的范围为T12至L2-L3，平均为L1-L2。19至20岁组脊髓圆锥水平范围为L1至L2，平均为L1-L2。我们得出结论，脊髓圆锥并非如先前作者所述在整个儿童期上升，而是在出生后的头几个月内的某个时候达到成人水平。在任何年龄，L2-L3或以上的脊髓圆锥水平应被视为正常。L3水平的脊髓圆锥不确定，因为正常或拴系的脊髓圆锥都可能位于此水平。
