From the Washington Post
When the U.S. Food and Drug Administration approved implanting microchips in humans, the manufacturer said it would save lives, letting doctors scan the tiny transponders to access patients' medical records almost instantly. The FDA found "reasonable assurance" the device was safe, and a sub-agency even called it one of 2005's top "innovative technologies."
But neither the company nor the regulators publicly mentioned this: A series of veterinary and toxicology studies, dating to the mid-1990s, stated that chip implants had "induced" malignant tumors in some lab mice and rats.
Glaring omission anyone? The FDA's not talking and anyone else involved says they hadn't read the study. Given that it's the FDA's job
to find relevant studies and that the studies about the cancer link were widely available, it seems that something dirty has happened. Of course, the FDA hasn't actually done its job in years