1. 1) Helseth A, Mork SJ : Primary intraspinal neoplasms in Norway, 1955 to 1986. A population-based survey of 467 patients. J Neurosurg 71 : 842-845, 1989
2. 2) Wu L, Yang C, Liu T, et al : Clinical features and long-term outcomes of pediatric spinal meningiomas. J Neurooncol 133 : 347-355, 2017
3. 3) Kleihues P, Cavenee WK : Pathology and Genetics of Tumors of the Nervous System. Lyon, IARC Press, 2000
4. 4) Hafiz MG, Rahman MR, Yeamin MB : Intradural intramedullary spinal cord meningioma in a seven years old female child. Mymensingh Med J 22 : 180-185, 2013
5. 5) The Committee of Brain Tumor Registry of Japan : Report of brain tumor registry of Japan (1984-2000) 12th edition. Neurol Med Chir (Tokyo) 49 (Suppl) : 1-25, 2009