Tuberous sclerosis complex (TSC) is a genetic disorder that causes tumors to form in many different organs, primarily in the brain, eyes, heart, kidney, skin and lungs. You will see it referred to both as tuberous sclerosis (TS) and tuberous sclerosis complex (TSC).

Because TSC is a genetic disorder, it is not contagious. It is the result of a genetic mutation over which a parent has no control. It is often first recognized in children who have two neurological symptoms—epileptic seizures and/or varying degrees of mental handicap. However, the clinical symptoms of TSC vary greatly and may often not appear until later in life. There are presently no cures and there is no way to predict how severely or mildly an individual may be affected by