| http://www.w3.org/ns/prov#value | - Information from references 5, 6 and 8.Most systemic tumor cells reach the brain by hematogenous spread through the arterial circulation.5,6,8 Occasionally, these cells can reach the brain by way of Batson's plexus (a venous system that drains the base of the skull, spinal column and pelvis) or by direct extension from adjacent structures such as the sinuses or skull.
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