Myxopapillary ependymoma of the lateral ventricle. A study on the mechanism of its stromal myxoid change.

Reported was the first case of myxopapillary ependymoma arising from the right lateral ventricle of a 29-year-old Japanese male. The histological and ultrastructural findings were identical to those from the filum terminale. It was suggested that insudation of plasma proteins found within hyaline-thickened blood vessels in the tumor stroma represented the presence of previous long-standing anoxia and thus, circulatory disturbance would be closely related to the formation of the stromal myxoid change.