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What are they?

Neural stem therapies involve invasive procedures where stem cells are surgically injected into the brain.

What are they used for?

They seek to repair damage caused by stroke or by progressive brain conditions such as Parkinson’s disease. Current research into these techniques includes a clinical trial in stroke patients. It is too early to say whether this will provide an effective treatment.

What are the potential risks?

Risks resulting from neurosurgery itself include infection or bleeding in the brain. Other possible complications include pain or tumour development if the implanted cells do not grow or integrate as expected. Once the cells are implanted it may not be possible to remove them.

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