To grow, cancer tumors must hijack the immune system for their needs. One of the main tricks that most tumors use is to manipulate a type of immune cell called a macrophage, causing it to protect the ...

Using high-resolution real-time intravital imaging ... Further investigations confirmed that these structures were macrophage ...

That's when the vetting occurs: Cells showing signs of stress (having high levels of toxic molecules known as reactive oxygen species) were engulfed and eaten by the macrophages, the team found.