3Hart MN, Earle KM. Primitive neuroectodermal tumors of the brain in children [J]. Cancer, 1973,32 : 890.
4Enzinger FM, Weiss W. Primitive neuroectodermal tumors and related lesions[ M]∥Soft tissue tumor. 3rd ed. St Louis: The CV Moshy Co, 1995:929 - 964.
5Humphreg GB, Dehenr L,D, Kaplan RJ, et al. Overview on the management of primitive neuroectodermal tumors [M]∥Humphorey GB, Dehner LP eds. Pediatnic oncology I. The Hague: Martrus Nijheff, 1981:289.
6Kosmik EJ. Baasel CP, Bag J, et al. Primitive neuroectodermal tumors of the central nervous system in children [J]. J Neuro Surg, 1978,48: 741.
