An implant that traps cancer cells could help doctors monitor cancer's progress and check to see if treatments are working, all without invasive biopsy.

A newly discovered vesicle is the first identified in 20 years and the smallest known, say researchers. And it acts like a bike courier.

New research suggests that if the collagen fiber structure is just right, then even a soft tumor might become invasive.

"This is a safe and almost nontoxic treatment compared to chemotherapy, which often leaves patients with lifelong issues."

Nanoparticles that catch a ride on white blood cells can track down and destroy cancer cells set loose by surgery.