Gangliocytic Paraganglioma of the Cauda Equina with Significant Calcification: First Description in Pediatric Age - Vural, M; Arslantas, A; Isiksoy, S; Adapinar, B; Atasoy, M; Soylemezoglu, F (Central European Neurosurgery - Zentralblatt für Neurochirurgie, 2008)