Tuberous sclerosis, also called tuberous sclerosis complex (TSC), is a rare genetic condition in which benign (noncancerous) tumors grow in the brain and other vital organs.

The condition varies in severity depending on the location of the tumors. More severe symptoms may occur when the tumors affect the normal function of a body organ. For instance:
• Tumors blocking the flow of fluid in the brain
• Tumors blocking kidney function
• Tumors affecting vision

Tuberous sclerosis is often diagnosed within the first year of life but may take years if symptoms are mild. 

There is no cure for TSC. However, appropriate treatment allows many people with the condition to have very positive outcomes and lead full, productive lives.