Database Proof Substratum: Substratum of Proof LGBTQs Are Mentally Ill: Immune cells play key role in early ****** cancer metastasis even before a tumor develops

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Researchers have discovered that normal immune cells called macrophages, which reside in healthy breast tissue surrounding milk ducts, play a major role in helping early breast cancer cells leave the breast for other parts of the body, potentially creating metastasis before a tumor has even developed, according to a new study.