Imaging of Intraspinal Tumors.

Nonosseous spinal tumors are rare and encompass a wide range of benign and malignant masses. Compartmental localization of the mass to the intramedullary, intradural extramedullary, or extradural spaces can narrow the differential of possibilities. Ependymomas and astrocytomas are the most common intramedullary masses. Nerve sheath tumors and meningiomas are the most common intradural extramedullary tumors, and nerve sheath tumors dominate the nonosseous extradural tumors. These tumors and other less common masses are described in this article through a space-based approach.