Clinicopath ConfSyringomyelia, ? With Syringobulbia, Chiari Malformation of Hindbrain, Type I, Case 3-1986, NEJM 316, 150-15., 1987
Intramedullary Cystic Lesions of the Conus MedullarisJNNP 31:106, Nassar,S.,et al, 1968