Tuberous sclerosis complex

For family education. This resource is not an individual diagnosis or treatment plan. Discuss concerns with an appropriately qualified professional.

What it means

Tuberous sclerosis complex (TSC) is a genetic condition that can cause growths in several organs and affect brain development. Seizures, learning differences, and behavioral or communication needs may occur, but not every child has developmental impairment. Ongoing surveillance helps detect problems before they become obvious.

Causes and risk factors

Changes in TSC1 or TSC2 affect a pathway that regulates cell growth. A change may be inherited or arise for the first time in the child. Features vary widely, including within families. Genetic counseling supports understanding of the result and options for appropriate family evaluation.

Signs and everyday impact

Possible early signs include pale skin patches, seizures, infantile spasms, or heart growths found before birth. Later concerns can involve skin, kidneys, eyes, learning, attention, autism, or behavior. Some organ problems are initially silent. Repeated short spasms or loss of skills need prompt attention.

Assessment and diagnosis

Diagnosis uses established clinical criteria and genetic testing when appropriate. Specialists assess the brain, kidneys, heart, skin, eyes, and other relevant systems, alongside development and behavior. EEG and imaging are scheduled according to age and clinical findings. Surveillance remains important even when a child seems well.

Treatment and therapy

Treatment is directed at specific problems. Seizures may need syndrome-specific medicines, and selected children may benefit from surgery or targeted medicines affecting the growth pathway. Organ growths require specialist monitoring or treatment. Developmental therapies, AAC, educational support, and care for attention, sleep, and emotional needs complement medical treatment.

Support at home

Keep a shared surveillance calendar and written seizure plan. Learn what the child's usual events look like and report changes. Support communication and meaningful play, with goals based on the individual child. Ask about family support and how developmental, behavioral, and medical teams can coordinate appointments.

When to seek help

Suspected infantile spasms require same-day urgent assessment. Use the seizure plan for prolonged events. Severe pain, blood in urine, breathing difficulty, or marked reduction in alertness also needs urgent medical review.

Questions for the care team

• Which surveillance tests are due and why?
• How should we recognize and respond to spasms or seizures?
• Are targeted treatment and developmental supports appropriate?

Terms in plain language

• TSC1 and TSC2: genes involved in regulation of cell growth.
• Surveillance: scheduled checks for possible health complications.
• mTOR pathway: a cellular signaling system involved in growth regulation.

Podcast preparation

Use this resource to prepare a later episode: define the topic, discuss causes and signs, explain assessment, describe treatment and home supports, then close with urgent signs and a next step.

Myth: all children with TSC have severe learning difficulties. Developmental effects vary widely.

Verify current clinical guidance and obtain clinical review before public recording.

Sources

1. Tuberous Sclerosis Complex | National Institute of Neurological Disorders and Stroke - https://www.ninds.nih.gov/health-information/disorders/tuberous-sclerosis-complex
2. INFANTILE EPILEPTIC SPASMS SYNDROME (IESS) - https://www.epilepsydiagnosis.org/syndrome/west-syndrome-overview
3. 6 Treating childhood-onset epilepsies | Epilepsies in children, young people and adults | Guidance | NICE - https://www.nice.org.uk/guidance/ng217/chapter/treating-childhood-onset-epilepsies

Sources accessed 3 October 2026.