Medical microchip for people may cause cancer

Published in veterinary and toxicology journals between 1996 and 2006, the studies found that lab mice and rats injected with microchips sometimes developed subcutaneous “sarcomas” — malignant tumors, most of them encasing the implants.

• A 1998 study in Ridgefield, Conn., of 177 mice reported cancer incidence to be slightly higher than 10 percent — a result the researchers described as “surprising.”
• A 2006 study in France detected tumors in 4.1 percent of 1,260 microchipped mice. This was one of six studies in which the scientists did not set out to find microchip-induced cancer but noticed the growths incidentally. They were testing compounds on behalf of chemical and pharmaceutical companies; but they ruled out the compounds as the tumors’ cause. Because researchers only noted the most obvious tumors, the French study said, “These incidences may therefore slightly underestimate the true occurrence” of cancer.
• In 1997, a study in Germany found cancers in 1 percent of 4,279 chipped mice. The tumors “are clearly due to the implanted microchips,” the authors wrote.

Caveats accompanied the findings. “Blind leaps from the detection of tumors to the prediction of human health risk should be avoided,” one study cautioned. Also, because none of the studies had a control group of animals that did not get chips, the normal rate of tumors cannot be determined and compared to the rate with chips implanted.

Still, after reviewing the research, specialists at some pre-eminent cancer institutions said the findings raised red flags.

“There’s no way in the world, having read this information, that I would have one of those chips implanted in my skin, or in one of my family members,” said Dr. Robert Benezra, head of the Cancer Biology Genetics Program at the Memorial Sloan-Kettering Cancer Center in New York.

Before microchips are implanted on a large scale in humans, he said, testing should be done on larger animals, such as dogs or monkeys. “I mean, these are bad diseases. They are life-threatening. And given the preliminary animal data, it looks to me that there’s definitely cause for concern.”

Dr. George Demetri, director of the Center for Sarcoma and Bone Oncology at the Dana-Farber Cancer Institute in Boston, agreed. Even though the tumor incidences were “reasonably small,” in his view, the research underscored “certainly real risks” in RFID implants.

In humans, sarcomas, which strike connective tissues, can range from the highly curable to “tumors that are incredibly aggressive and can kill people in three to six months,” he said.

‘Some reason to be concerned’
At the Jackson Laboratory in Maine, a leader in mouse genetics research and the initiation of cancer, Dr. Oded Foreman, a forensic pathologist, also reviewed the studies at the AP’s request.

At first he was skeptical, suggesting that chemicals administered in some of the studies could have caused the cancers and skewed the results. But he took a different view after seeing that control mice, which received no chemicals, also developed the cancers. “That might be a little hint that something real is happening here,” he said. He, too, recommended further study, using mice, dogs or non-human primates.

Dr. Cheryl London, a veterinarian oncologist at Ohio State University, noted: “It’s much easier to cause cancer in mice than it is in people. So it may be that what you’re seeing in mice represents an exaggerated phenomenon of what may occur in people.”

Tens of thousands of dogs have been chipped, she said, and veterinary pathologists haven’t reported outbreaks of related sarcomas in the area of the neck, where canine implants are often done. (Published reports detailing malignant tumors in two chipped dogs turned up in AP’s four-month examination of research on chips and health. In one dog, the researchers said cancer appeared linked to the presence of the embedded chip; in the other, the cancer’s cause was uncertain.)

Nonetheless, London saw a need for a 20-year study of chipped canines “to see if you have a biological effect.” Dr. Chand Khanna, a veterinary oncologist at the National Cancer Institute, also backed such a study, saying current evidence “does suggest some reason to be concerned about tumor formations.”

Meanwhile, the animal study findings should be disclosed to anyone considering a chip implant, the cancer specialists agreed.

To date, however, that hasn’t happened.

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