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Neonatal stroke, similar to a stroke which occurs in adults, is defined as a disturbance to the blood supply of the developing brain in the first 28 days of life. This description includes both ischemic events, which results from a blockage of vessels, and hypoxic events, which results from a lack of oxygen to the brain tissue, as well as some combination of the two. One treatment with some proven benefits is hypothermia, but may be most beneficial in conjunction with pharmacological agents. Well-designed clinical trials for stroke treatment in neonates are lacking, but some current studies involve the transplantation of neural stem cells and umbilical cord stem cells; it is not yet known if this therapy is likely to be successful.
Neonatal strokes may lead to cerebral palsy, learning difficulties, or other disabilities. A neonatal stroke occurs in approximately 1 in 4000 births, but is likely much higher due to the lack of noticeable symptoms.