• Gabriella M Paisan, Thomas J Buell, Daniel Raper, and Ashok Asthagiri.
• Department of Neurosurgery, University of Virginia, Charlottesville, Virginia, USA. Electronic address: gmp9ke@hscmail.mcc.virginia.edu.
• World Neurosurg. 2017 Dec 1; 108: 993.e13-993.e17.

BackgroundSpinal subdural hematomas (SSDHs) are rare and usually associated with bleeding diatheses, trauma, iatrogenic injury, spinal vascular malformations, or intraspinal tumors.Case DescriptionWe report a case of a 75-year-old man who developed a symptomatic lumbosacral SSDH after undergoing resection of a right temporal glioblastoma multiforme. The patient subsequently recovered and was discharged home. Over the next 2 weeks, he developed progressively worsening symptoms of lower back pain, lower extremity weakness, and urinary retention. Although the patient had no known risk factors for developing a SSDH, magnetic resonance imaging on postoperative day 16 revealed an extensive L2-sacrum SSDH. The patient underwent L2-L5 total laminectomies for evacuation of the SSDH. His symptoms resolved after surgery. Literature review produced 26 other cases of SSDHs after intracranial surgery in patients without obvious risk factors. In our case, the lumbosacral SSDH may have originated from downward migration of intracranial blood in a gravity-dependent fashion. Radiographic evidence of blood within the posterior thecal sac of the patient's cervical spine supports this hypothesis.ConclusionsIn most cases, SSDHs after intracranial surgery resolve with conservative treatment; however, as shown in our case, surgery may be required if there is progressive neurologic decline. Neurosurgeons should be aware of this potential complication after intracranial surgery; a magnetic resonance imaging of the spine may be indicated if there is unexplained lower extremity pain or weakness.Copyright © 2017 Elsevier Inc. All rights reserved.

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