Fig. 1
From: Neurosurgical emergencies in spinal tumors: pathophysiology and clinical management
Axial appearance of the spinal cord showing the different spinal cord compartments (A), and a tumor occupying the extradural space (B), intradural-extramedullary space (C), and intramedullary space (D). The tumor in B indents the dura but does not fully occlude the subarachnoid space. In C, the tumor indents the spinal cord and displaces it posteriorly. In D, the tumor is contained completely within the spinal cord, and expands its cross-sectional area