Figure 2.

The Weinstein-Boriani-Biagini classification assists surgical planning by establishing feasibility criteria and strategies to achieve oncological resection of tumors. The vertebra is divided into 12 equal radiating zones in an axial plane. The tumor is further divided into five concentric layers centered around the thecal sac and the presence or absence of vertebral artery involvement: Soft tissue (A), Intraosseous superficial (B), Intraosseous deep (C), Extradural (D), Intradural (E), Vertebral artery involvement (F) Based on these stages, surgical procedures are proposed.