Virginia Tech Jul 3 2025 Scientists have revealed how certain immune cells may be quietly helping prostate cancer grow - and how blocking them could help the body fight back. The study, published July 2 as the cover story in  Molecular Cancer Research , identifies a group of cells called macrophages that, instead of protecting the body, appear to shield tumors from attack and promote tumor metastasis .  These cells are typically the immune system's housekeeping crew - engulfing dead cells and