Case Record of MGH
Medulloblastoma Metastasizing to Subarachnoid Space, NEJM 295:5531976., , 1976
Ependymomas of the Posterior Cranial Fossa:CT and MRI Findings
Neuroradiology 37:238-243, Tortori-Donati,P.,et al, 1995
Intradural Conus and Cauda Equina Tumours:A Retrospective Review of Presentation, Diagnosis & Early Outcome
JNNP 56:69-74, Mathew,P.&Todd,N.V., 1993