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Tuberous Sclerosis Complex (TSC) is a genetic condition that can lead to growths in various organs of the body, but those most commonly affected are the brain, eyes, heart, kidney, skin and lungs. These growths may also be referred to as tumours but they are not cancerous. When they cause problems it is mainly because of their size and where they are in the body.

TSC growths have different names depending on which organ they are found in. TSC varies from person to person and most people with TSC do not have all of the features described. The impact of TSC varies considerably, with some people being relatively mildly affected (they may not even know they have TSC) and others being more significantly affected.

This impact may be evident in the early years, or not until adulthood. Each month 10 babies are born in the UK with TSC and an estimated 1 million people world-wide have TSC. Some will be diagnosed with TSC very early in life whilst others may not be diagnosed until later childhood, adolescence or adulthood.