EFO_1000923 (epidural neoplasm) is neoplasms located in the space between the vertebral PERIOSTEUM and DURA MATER surrounding the SPINAL CORD. Tumors in this location are most often metastatic in origin and may cause neurologic deficits by mass effect on the spinal cord or nerve roots or by interfering with blood supply to the spinal cord. Also known as: Epidural Neoplasms, Extradural tumor, epidural spinal canal neoplasm.