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Features

Tuberous sclerosis causes non-cancerous (benign) tumours to develop in many areas of the body. The condition can lead to a range of different problems depending on where the tumours grow.

Areas most commonly affected are the: 

  • brain
  • skin
  • kidneys
  • heart
  • eyes
  • lungs

Problems caused by these tumours can develop at any age, but most often start early in childhood. The severity of these problems can vary significantly, and some tumours cause no noticeable problems.

The main problems these tumours can cause are described below.

Problems affecting the brain

Tumours that develop in the brain can cause a range of problems.

Epilepsy and spasms

Most people with tuberous sclerosis will have epilepsy and experience repeated seizures (fits).

Some young children experience a more serious condition, known as infantile spasms, where they have lots of seizures over a short space of time and brain activity is abnormal all the time. These usually develop during the first year of life.

Infantile spasms tend to disappear as a child gets older but, by then, they may have led to some degree of permanent brain damage, which can cause problems such as moderate to severe intellectual disability, epilepsy that does not respond to medication, and autism.

It's important for infantile spasms to be identified as early as possible, as early treatment markedly reduces the risk of brain damage.

Learning disabilities

Nearly half of all children with tuberous sclerosis will have a learning disability, which can range from mild to severe.

This means they may: 

  • have poor memory
  • have a poor attention span
  • have difficulty making plans or organising activities
  • learn much more slowly than other people
  • in severe cases, be unable to communicate or look after themselves

Read more about learning disabilities.

Behavioural and neurodevelopmental conditions 

Behavioural and neurodevelopmental conditions are more common in children with tuberous sclerosis, particularly those with learning disabilities.

These problems can include: 

  • autism spectrum disorder – a condition that can affect social interaction, communication, interests and behaviour
  • hyperactivity and impulsive behaviour
  • aggression and self-harm
  • anxiety
  • extreme shyness
  • depression
  • sleep disorders – such as finding it difficult to get to sleep or frequently waking up during the night

Hydrocephalus

A small number of people with tuberous sclerosis develop large brain tumours that grow big enough to obstruct the flow of cerebrospinal fluid through the brain.

If the flow of cerebrospinal fluid is blocked, it can cause pressure to build in the brain. This is called hydrocephalus. Symptoms can include:

  • headaches
  • neck pain
  • feeling and being sick
  • increasing drowsiness
  • changes in your mental state, such as confusion
  • blurred vision, double vision or loss of vision
  • difficulty walking
  • a sudden change in bladder or bowel control, such as urinary incontinence
  • worsening epilepsy or challenging behaviour

Brain tumours can be detected through regular brain scans and treated before they cause hydrocephalus.

If hydrocephalus develops, emergency surgery is required to drain away excess fluid from the brain. If left untreated, it can cause brain damage or, in the most serious cases, death.

Skin problems

Most people with tuberous sclerosis will have abnormal growths or patches on their skin. They usually first develop during early childhood and can include:

  • patches of light-coloured skin
  • acne-like spots and blemishes on the face
  • areas of thickened skin
  • growths of skin under or around the nails
Kidney problems

Most people with tuberous sclerosis will have multiple growths in their kidneys, including tumours and cysts (small fluid-filled sacs).

These do not always cause problems but can lead to:

Heart tumours

Many children born with tuberous sclerosis will develop one or more tumours inside their heart.

These tumours are usually very small and do not cause any symptoms. Most heart tumours will shrink as a child gets older.

However, in a small number of cases, the tumours can cause problems such as an irregular heartbeat (arrhythmia) or heart failure.

Eye tumours

Most people with tuberous sclerosis will develop one or more tumours inside their eyes.

These tumours grow on the surface of the retina, which is the thin layer of nerve cells that line the inside of the back of the eye.

However, these tumours rarely grow large enough to affect a person's vision.

Lung tumours

At least 1 in every 3 women with tuberous sclerosis will develop tumours and cysts inside their lungs, usually between the ages of 20 and 40. It's unclear why women are commonly affected and men rarely are.

In many cases, these cysts and tumours do not cause a problem.

However, some women experience breathing difficulties similar to chronic obstructive pulmonary disease (COPD) and occasionally the tumours can rupture, causing a serious problem where air leaks out of the lungs and into the surrounding area.

Last Reviewed
03 October 2023
NHS websiteNHS website
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Hedgegrail Pharmacy in Stoke Poges offers a wide range of prescription and over-the-counter medications, as well as health and beauty products
Company Registration: 2041755
Premises GPhC: 1099892
Superintendent: Baljit Singh Bahra
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