Glossary
- Shagreen patch: Flesh-colored and dimpled, resembling an orange peel, skin patch found on the lower back.
 - SHANK3 gene: A gene that encodes for a master scaffolding protein involved in synaptic functioning.
 - Subependymal giant cell astrocytomas (SEGAs): Tumor-like lesions in the brain that have grown and if left untreated, can cause hydrocephalus.
 - Subependymal nodules (SENs): Benign, non-growing lesions found along the wall of the lateral ventricles in the brain.