What are the symptoms? 

The most common symptoms of TSC are seizures and developmental delay, as well as benign tumors and lesions which can affect virtually every organ system of the body including the brain, kidneys, heart, lungs, eyes, skin, and other organs. In many instances, symptoms of TSC will be apparent in the first six months of life.

Brain and Neurological Function:
In 95% of individuals with TSC, the brain is somehow affected. This usually takes the form of cortical tubers, subependymal nodules and subependymal giant cell astrocytoma (SEGA), which can be detected by brain imaging.  

Epilepsy is by far the most common medical condition in TSC, occurring in 80-90% of individuals. In about one third of individuals with TSC, epilepsy starts out as infantile spasms. Peak onset occurs at about 4-6 months of age.  

Individuals with TSC have an increased risk of having neurodevelopmental and behavioral impairment. Although approximately 50% of individuals with TSC have normal intelligence, developmental delay and learning disabilities are commonly found in children with TSC.  Additionally, up to 50% of individuals with TSC can develop autism.