What's the most common tumor of the spinal cord?

It depend on the : Location, spinal tumors are classified according to their location in the spine. Extradural (metastatic tumors) intradural-extramedullary tumors.(schwannomas and neurofibromas) intramedullary tumors. The most common spinal cord tumors (or intramedullary tumors) are ependymomas, ependymoma &astrocytomas , hemangioblastomas, in that order.

Metastatic tumors: By incidence, the most common tumors that affect the spinal cord (sc) are metastatic (55%; from lung, breast, prostate or lymphoma). Looking at the sc from superficial to deep, the next layer affected are tumors within the dural sac but out of the sc (40%). These include schwannomas and meningiomas. Last layer are tumor within the sc (about 5%), which include astrocytomas and ependymomas.