Subependymal giant cell astrocytoma

Subependymal giant cell astrocytoma (SEGA, SGCA, or SGCT) is a low-grade astrocytic brain tumor (astrocytoma) that arises within the ventricles of the brain. It is most commonly associated with tuberous sclerosis complex (TSC).

Source: Wikipedia — Subependymal giant cell astrocytoma (CC BY-SA 4.0)