Occurrence of hematoma in the epidural space is common after lumbar disc surgery even if meticulous hemostasis has been achieved. Insertion of a drain decreases both the incidence and the size of hematoma on the first postoperative day as detected by MRI. This may have practical implications for the prevention of significant postoperative fibrosis and obtaining better surgical outcome.
).Spinal tumors consist of a large spectrum of various histologic entities. Primary spinal tumors may arise from the spinal cord (intraaxial or intramedullary space), the surrounding leptomeninges (intradural extramedullary space), or the extradural soft tissues and bony structures (extradural space). Almost 60% of the spinal tumors are located in the extradural space, whereas 40% are located within the dural sac. Primary tumors of the spine are uncommon and represent < 5% of all bone neoplasms as compared with secondary metastatic disease, multiple myeloma, and lymphoma.
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