Syringomyelia and spinal arachnoiditis resulting from aneurysmal subarachnoid hemorrhage: Report of two cases and review of the literature.

Syringomyelia resulting from arachnoiditis secondary to aneurysmal subarachnoid hemorrhage (SAH) is an extremely rare clinical entity with few cases reported in the literature. The presentation, management, and pathogenesis of syringomyelia in this setting is poorly understood. We describe the presentation, radiology, management, and outcomes in two patients with syringomyelia resulting from arachnoiditis secondary to aneurysmal SAH and review the literature on this rare condition. Case number 1 was treated successfully with syrinx-subarachnoid shunt after extensive lysis of adhesions. Case number 2 was treated with syringoperitoneal shunt. Both patients had radiographic decreased syrinx size postoperatively. These patients add to the small literature on syringomyelia occurring secondary to SAH-associated arachnoiditis. The radiographic outcomes demonstrate that in the appropriately selected patient, syrinx-subarachnoid or syringoperitoneal shunting are viable options.