Alveolar Rhabdomyosarcoma of the Clivus with Intrasellar Expansion: Case Report - Seiz, M; Radek, M; Buslei, R; Kreutzer, J; Hofmann, B; Kottler, U; Doerfler, A; Nimsky, C; Fahlbusch, R (Zentralblatt für Neurochirurgie, 2006)