Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, New York. Electronic address: RJRothrock@gmail.com. Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, New York.
OBJECTIVE Spinal subdural hematoma (S-SDH) rarely occurs after aneurysmal subarachnoid hemorrhage (SAH). Little information is known regarding the management and prognosis of patients with both S-SDH and SAH. Here, we present an illustrative Case and provide a systematic review of S-SDH in the setting of SAH. METHODS A systematic literature review using PRISMA guidelines revealed 11 previous cases of concurrent
intracranial SAH and spinal SDH, which are presented with our new reported Case. RESULTS Intracranial sources of spontaneous SAH included 8 aneurysms, 1 pseudoaneurysm, and 3 angiogram negative cases. Hunt Hess grade ranged from 1-4, mean time between SAH and S-SDH was 5.8 days, and S-SDH presented most frequently in the lumbar spine. 8 patients showed significant to complete clinical recovery, 2 had continued plegia of the lower extremities, and 2 expired. Modified Rankin score ranged from 0-6, with mRS > 2 for 4 out of 12 patients. Patients with a poor clinical outcome (mRS > 2) had an initially negative cerebral angiogram, earlier presentation with less time between SAH and S-SDH (0.8 vs 7.6 days), use of antithrombotic medication, no diversion of CSF, and cervical or thoracic S-SDH. CONCLUSION S-SDH is an uncommon occurrence in the setting of aneurysmal SAH with better outcomes associated with lumbar location, delayed presentation, CSF diversion, and lack of antithrombotic use. Conservative treatment may be sufficient in cases with delayed S-SDH and lack of significant neurological deficits. More reported cases will allow greater understanding of this clinical entity.