1. Ependymomas;Arendt,1975
2. Sclerosing hemangiomas of the central nervous system; progressive tissue changes in hemangioblastomas of the brain and in so-called angioblastic meningiomas;Bailey;Am J Pathol,1942
3. Sarcomas and neoplasms of blood vessels;Berger,1996
4. Ependymoma;Burger,1991
5. Ependymal neoplasms;Burger,1994