1. American brain Tumor Association. Available from: http ://www. abta.org/about-us/news/brain-tumor-statistics/ (Accessed on: 20 Oct 2016)
2. Ellison,L.; Janz,T. Chil dhood cancer incidence and morta lity in Canada. Available from: http ://www.statcan.gc.ca/pub/82-624-x/2015001/article/14213-eng.htm (Accessed on: 20 Oct 2016).
3. Buckner JC, Brown PD, O’Neill BP.;et al. Central nervous system tumors. Mayo Clin Proc. 2007; 82(10): 1271-86
4. Meningioma: Stages and Grad es. Available from: http://www. cancer.net/cancer-types/meningioma/stages-and-grades (Accessed on: 22 Oct 2016)
5. Kleihues.; P.; Cavenee,WK.; Ed. WHO Classification of tumors: Pathology and genetics of tumors of the nervous system. IARC Press: Germany. 2000