3Becker LE, Primitive neuroectodermal tumors view on a working classification. Primary brain tumors[ M ]. New York : Ed, By W. S. fields Springer Verlay, 1990:59 - 69.
4Jaw TS, Kuo YT, Liu GC, et al. MR cholangiography in the evaluation of neonatal cholestasis[ J]. Radiology, 1999,212 ( 1 ) : 249 - 256.
5Ladanyl M, Heinemann FS, Huvos AG, et al. Neural differentiation in small round cell tumors of bone and soft tissue with the transloeation t ( 11 ; 22 ) ( q24 ; q12 ) : an immunohistoehemieal study of 11 eases [J]. Hum Pathol,1990,21(12) :1 245 -1 251.
9Winer-Muram HT, Kauffman WM, Gronemeyer SA, et al. Primitive neuroectodermal tumors of the chest wall( Askin tumors) :CT and MR findings [ J ]. A JR Am J Roentgenol, 1993,161 (2) :265 - 268.
10Miser JS, Kinsella TJ, Triche TJ, et al. Treatment of peripheral neuroepithelioma in children and young adults[ J]. J Clin Oncol, 1987,5 (11):1 752-1 758.
7Dick EA,Mchug HK,Kimber C,et al.Imaging of non-central nervous system primitive neuroectodermal tumors:Diagnostic features and correlation with outcome[J].Clin Radiol,2001,56 (3):206-215.
8[1]Grirer HE. The Ewing family of tumors. Ewing's sarcoma and primitive nruroectodermal tumors [J]. Pediatr Clin North Am, 1997,44(4):991～1004
9[2]Pauwels P, Ambros P, hattinger C, et al. Peripheral primitive neuroectodermal tumor of the cervix[J]. Mirchows Arch, 2000,436(1) :68～ 73
10[3]Gu M, Antonescn CR, Guiter G, et al. Cytokeratin immunohistotivity in Ewing's sarcoma::prevalence in 50 cases confirmed by molecular diagnostic studies [J]. Am J Surg Pathol,2000,24(3) :400～416
