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Cancer & Tumors0

Effects of mobile-phone microwave on dimethylbenz (a) anthracene induced mammary carcinoma development in rats.

No Effects Found

Shen YH, Yu D, Fu YT, Chiang H. · 2006

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Cell phone radiation at levels up to twice typical phone use didn't accelerate breast cancer development in this rat study.

Plain English Summary

Summary written for general audiences

Chinese researchers exposed 500 female rats to cell phone radiation (900 MHz GSM signals) for 4 hours daily over 26 weeks after giving them a chemical known to cause breast tumors. They tested different radiation levels, including some well above typical phone exposure. The study found no difference in breast cancer rates between exposed and unexposed rats - about one-third developed tumors regardless of radiation exposure.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 900 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 900 MHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

The study examined exposure from: 900 MHz GSM Duration: 4 hours/day, 5 days/week for 26 weeks

Study Details

To investigate whether exposure to 900 MHz GSM wireless communication signals enhances mammary tumor development and growth induced by low dose dimethylbenz (a) anthracene (DMBA).

Five hundred female Sprague Dawley (SD) rats were treated with a single dose of 35 mg/kg. DMBA and t...

The incidence of mammary carcinoma in sham-exposure group was 37% (37/100). And mammary carcinoma in...

This study does not provide the evidence that 900 MHz GSM microwave exposure might promote DMBA-induced mammary tumor development in rats.

Cite This Study
Shen YH, Yu D, Fu YT, Chiang H. (2006). Effects of mobile-phone microwave on dimethylbenz (a) anthracene induced mammary carcinoma development in rats. Zhonghua Yu Fang Yi Xue Za Zhi. 40(3):164-167, 2006.
Show BibTeX
@article{yh_2006_effects_of_mobilephone_microwave_3392,
  author = {Shen YH and Yu D and Fu YT and Chiang H.},
  title = {Effects of mobile-phone microwave on dimethylbenz (a) anthracene induced mammary carcinoma development in rats.},
  year = {2006},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/16836878/},
}
PubMed: 16836878

Quick Questions About This Study

No, a 2006 Chinese study found no evidence that 900 MHz GSM radiation promotes breast cancer development in rats. Researchers exposed 500 female rats to cell phone radiation for 4 hours daily over 26 weeks, finding identical tumor rates (around one-third) in both exposed and unexposed groups.
The 2006 study tested three different SAR levels: 0.44 W/kg, 1.33 W/kg, and 4.00 W/kg of 900 MHz GSM radiation. These levels included exposures well above typical cell phone use, yet none showed any significant difference in breast cancer development compared to unexposed rats.
Researchers exposed rats to 900 MHz GSM radiation for 4 hours daily over 26 weeks (about 6 months). This extended exposure period was designed to test whether prolonged cell phone radiation could promote breast tumor development after chemical induction with DMBA.
The study found both malignant tumors (adenocarcinoma and squamous cell carcinoma) and benign tumors (adenoma, fibroadenoma, and cysts) in rats. Interestingly, some individual rats developed multiple tumor types simultaneously, but radiation exposure didn't influence which types developed.
No, adding 900 MHz GSM radiation to DMBA chemical exposure did not increase breast cancer rates in rats. About one-third of rats developed tumors regardless of radiation exposure level, indicating that cell phone frequencies don't promote chemically-induced breast cancer development.