Researchers discovered that pancreatic cancer hides behind a sugar-based “don’t attack” signal that shuts down the immune system. An experimental antibody removed that disguise in mice, allowing immune cells to fight back and slow tumor growth. Credit: Shutterstock Scientists at Northwestern have uncovered a clever trick that helps pancreatic cancer hide from the immune system -- and a potential way to stop it. Pancreatic cancer remains one of the most lethal cancers, often found too late and