The most common sign of the condition is the 'port wine' stain on the face, named because of its colour. However, in about 13 per cent of cases there is no port wine stain.
Some of the neurological problems that children can suffer from include:
- hemiparesis (weakness down one side of the body)
- overgrowth of one side of the body
- seizures - these can sometimes be difficult to control
- frequent 'stroke-like' episodes
- eye abnormalities - including glaucoma and buphthalmos (enlargement and
protrusion of the eye), which can occur because of the high
pressure within the eyeball. In severe cases this can lead to
Problems with learning and development are more common when angiomas are found on both sides of the brain (involving the right and left brain hemisphere).
Symptoms in SWS can vary a lot. This is because the symptoms are often related to where the angiomas on the brain surface are found and how widespread they are.