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A member asked:
Why are there no lymphatic vessels in the left side of the brain?
A doctor has provided 1 answer
Lymph nodes: The central nervous system including the brain and spinal cord lack classical lymph vessels. There is a blood brain barrier to prevent or reduce the risk of infection entering the brain. The blood brain barrier may also explain why primary brain tumors rarely spread outside the brain.
Answered 6/21/2014
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