Observations on some rare cases of vertebro-medullar malformations associated with tumors.

Three cases of complex vertebro-medullary malformations of the diastematomyelic type associated with dysembriogenetic tumors are presented. In the first case, a true diastematomyelia, associated with a teratoma of mixed histological structure, is described. In the second and third cases, diplomyelia associated with an epidermoid and a dermoid cyst respectively are reported.