Scientists Recommend Stronger Indications of RF Causing Tumors in Rats
rrmediagroup.com, 6 July 2018
Scientific experts recommended that some National Toxicology Program (NTP) conclusions be changed to indicate stronger levels of evidence that cellphone radiofrequency radiation (RFR) caused tumors in rats. The experts met to review the conclusions of research released in February on the health effect of high RF exposure.
A panel of external scientific experts met March 26 – 28 and agreed with NTP conclusions that there was little indication of RFR-related health problems in mice. The studies, one in rats and one in mice, covered 10 years and $25 million.
The experts recommended that tumors in tissues surrounding nerves in the hearts of male rats, called malignant schwannomas, be reclassified from some evidence to clear evidence of carcinogenic activity. In female rats, they recommended reclassification of malignant schwannomas from no evidence to equivocal evidence of carcinogenic activity. The panel agreed that there were unusual patterns of cardiomyopathy, or damage to heart tissue, in exposed male and female rats.
The panel recommended that findings for a type of brain tumor, called malignant glioma, and a tumor in the adrenal gland, called pheochromocytoma, be reclassified as some evidence of carcinogenic activity in male rats. NTP researchers also looked for noncancerous health effects in rats and mice. The panel agreed that there were increases in damage to brain tissue in exposed male and female rats, which further supported the classifications of cancerous effects in the brain.
NTP Senior Scientist John Bucher, Ph.D., said the goal of the study was to establish the potential health hazard of exposure to cellphone RFR. He said that to detect a potential effect, the rodents’ whole bodies were exposed to levels equal to and higher than the highest level permitted for local tissue exposure in current cellphone emissions.
NTP staff will now evaluate each of the recommendations from the panel and prepare a final report, which they expect to complete this fall.
“The director has the authority to accept or reject the advice of the advisory panel,” Bucher said. “Once she has evaluated these recommendations, the changes will be made public.”
The full action report is here.