Subependymal Giant Cell Astrocytoma in an Adult without Tuberous Sclerosis: Systematic Review and Illustrative Case Example.

 Subependymal giant cell astrocytoma (SEGA) is a rare neoplasm arising from subependymal tissue. Predominantly associated with the tuberous sclerosis complex (TSC), SEGA may present with a range of diverse symptoms, most commonly seizures or neurocutaneous features of TSC. We present a novel case of sporadic SEGA in a 59-year-old woman who presented with acute intraparenchymal hemorrhage (IPH).