Implanted Microchips Cause Cancer
By Jane Williams GFN contributing writer---
(For Publication in the January 2007 "American Family Voice")
At the National ID Expo in Kansas City, Arkansas Animal Producer's
Association President Michael Steenbergen asked, "What safety studies
have been conducted on the chips that are inserted into animals?" His
question was met with total silence. Did these manufacturers not
know, or were they unwilling to admit that research has confirmed
that implanted microchips cause cancer? Melvin T. Massey, DVM (Doctor
of Veterinary Medicine)from Brownsboro,Texas, brought this to the
attention of the American Horse Council when he wrote, "I am a
retired Equine Veterinarian and still breed a few horses. Because of
migration-infection s-increased risk of sarcoids I will not want to
have microchips in my horses." The Institute of Experimental
Pathology at Hannover Medical Schoolin Germany reported , "An
experiment using 4279 CBA/J mice of two generations was carried out
to investigate the influence of parental preconceptual exposure to X-
ray radiation or to chemical carcinogens. Microchips were implanted
subcutaneously in the dorsolateral back for unique identification of
each animal. The animals were kept for lifespan under standard
laboratory conditions. In 36 mice a circumscribed neoplasm occurred
in the area of the implanted microchip.
Macroscopically, firm, pale white nodules up to 25 mm in diameter
with the microchip in its center were found. Macroscopically, soft
tissue tumors such as fibrosarcoma and malignant fibrous histiocytoma
were detected."
Ecole Nationale Veterinaire of Unite d'Anatomie Pathologique in
Nantes, France, reported, "Fifty-two subcutaneous tumors associated
with microchip were collected from three carcinigenicity B6C3F1
micestudies. Two of these 52 tumors were adenocarcinoma of the
mammary gland located on the dorsal region forming around the chip.
All the other 50 were
mesenchymal in ori! gin and were difficult to classify on
morphological grounds with haematoxylin-eosin." Marta Vascellari of
Instituto Zooprofilattico Sperimentale delle Venezie at Viale
dell'Universita in Legnaro, Italy reported examining a 9-year-old
male French Bulldog for a subcutaneous mass located at the site of a
microchip implant. "The mass was confirmed as a high-grade
infiltrative fibrosarcoma, with multifocal necrosis and peripheral
lymphoid aggregates."
The Toxicology Department of Bayer Corporation in Stillwell, Kansas
reported, "Tumors surrounding implanted microchip animal
identification devices were noted in two separate chronic
toxicity/oncogenici ty studies using F344 rats. The tumors occurred
at a low incidence rate (approximately 1%), but did result in the
early sacrifice of most affected animals, due to tumor size and
occasional metastases. No sex-related trends were noted.
All tumors occurred during the second year of the studies, were
located in the subcutaneous dorsal thoracic area (the site of
microchip implantation) and contained embedded microchip devices. All
were mesenchymal in origin and consisted of the following types,
listed on order of frequency: malignant schwannoma, fibrosarcoma,
anaplastic sarcoma, and histiocytic sarcoma.
The following diagnostic techniques were employed: light microscopy,
scanning electron microscopy, and immunohistochemistry. The mechanism
of carcinogenicity appeared to be that of foreign body induced
tumorigenesis. "
Additional studies related to cancer tumors at the site of microchip
implants have been conduced in China; however, at this time these
studies are not available in English. At this time, no long term
studies are available covering more than two years. It only seems
logical to conclude that if carcinogenic tumors occur within one
percent of animals implanted within two years of the implant that the
percentage would increase with the passage of time. Additional
studies need to be conducted, but don't hold ! your bre ath for the
manufacturers of microchips to conduct such research and be leery of
any such "research" they may conduct. Even the limited research
available clearly indicates that implantation of microchips within an
animal is gambling with the animal's well being.
For additional Information: www.vetpathology.org
also National Library of Medicine and National Institutes of Health,
or just google for "sarcomas associated with implanted microchips".
Pekka J
PS En tiedä mihinkä palstalle tämän olisin laittanut... toivottavasti se ei häiritse ketään täällä.