Posterior cerebral artery aneurysm (P2P segment): case report and review of the literature - Meguins, Lucas Crociati; Calzolari, Sergio Ivo Crivoi; Fares, Adil Bachir; Rocha, André Salotto; Valsechi, Linoel Curado; Santos, Felipe Oliveira Rodrigues; Spotti, Antônio Ronaldo; Morais, Dionei Freitas De (Arquivos Brasileiros de Neurocirurgia: Brazilian Neurosurgery, 2018)