References:

1 Demet Karadag，Ayse Tubagulle，Ayse Erden，et al.MR imaging of a ruptured intraspinal dermoid tumor with fat droplets in the central spinal canal[J].Australasian Radiology,2002,46:444-446.
2 Kadir Tufan，Melih Cekinmez，Levent Sener，et al.Infected lumbar dermoid cyst presenting with tetraparesis secondary to holocord central lesion[J].Journal of Child Neurology,2008,8(23):934-937.
3 郭启勇.实用放射学[M].第3版.北京:人民卫生出版社,2007,142-143.
4 Amirjamshidi A，Ghodski M，Edraki K.Teeth in the cerebellopontine angle:an unusal dermoid tumor[J].Br J Neurosurg，1995,9:312.
5 Marwan W.Najjar,John A.Kusske,Anton N.Hasson.Dormal intramedullary dermoid[J].Neurosurg Rev,2005,28:320-325.
6 Shen WC，Chiou TL，Lin TY.Dermal sinus with dermoid cyst in the upper cervical spine:case note[J].Neuroradiology,2000，42:51-53.
7 胡亚美，江载芳.诸福棠.实用儿科学[M].第7版，北京：人民卫生出版社，2005，2264-2265.
8 Gupta S，Gputa RK，Gujral RB，et al.Signal intensity patterns in intraspinal dermoids and epidermoids on MR imaging[J].Clin Radiol,1993,48:405.