Two different Primary Brain Tumors, Glioblastoma Multiforme and Pituitary Adenoma, in Association with Colorectal Carcinoma – An Unusual Case of Nonfamilial Turcot's Syndrome? - Naydenov, E.; Marinov, M.; Nachev, S. (Central European Neurosurgery - Zentralblatt für Neurochirurgie, 2011)