2[2] Houser R.Testicular tumors in children[J].Am J Surg,1965,110:876.
3[3] Kapian GW,Cromic WC,Kelalis PP,et al.Prepubertal yolk sac testicular tumors report of the testis tumor registy[J].J Urol,1988,140:1109.
4[2]Andrassy RJ,Hans DM.General principles of surgery.In:Pizzo PA,Poplack DG.Principles and practice of pediatric Oncology[M].3rd Philadelphia:Lippincott, 1997.273- 288.
5[3]Plon SE,Peterson LE.Childhood Cancer,Heredity and the Environment.In: Pizzo PA, Poplack DG.Principles and practice of pediatric oncology [M].3rd Philadelphia: Lippincott,1997.11- 36.
6[5]Dube JD,Courmoyer D.Gene therapy:here to stay [J].Can Med Ass J,1995, 152:1605- 1613.