So far, no specific clinical trials have been conducted on this topic because they are expensive and take a long time to complete. Large-scale health monitoring will take place once certification is obtained.
Testicular cancer usually has multiple causes, good prognosis, and often develops long after exposure to risks. This makes it very difficult to isolate heat as a direct cause. However, research has ruled out other potential risks, such as pollution.
Heat exposure and cancer risk
- Heat does not cause irreversible cell damage.
- Many professions involve regular heat exposure (e.g., bakers, chefs, welders), yet there is no link to increased cancer risk.
- There are no recorded cases of increased cancer among people using thermal contraception.
Latest findings
To explore gaps in knowledge, a meta-analysis was conducted by the Entrelac.coop medical task force and will be published soon.
Entrelac.coop Medical Task Force 2022
“Is there evidence linking testicular exposure to body heat with cancer risk?"
Conclusion: “Studies on the pathogenesis of testicular cancer do not identify heat exposure as a risk factor. Prospective studies observing the effect of testicular heat show no increase in testicular cancer.”
Carton 2023, Poitiers University Faculty of Medicine and Pharmacy
"Does extracorporeal heat constitute a risk of testicular cancer? Systematic review and meta-analysis"
Conclusion: “Our study cannot conclude that there is a link between external heat exposures and testicular cancer with the two meta-analyses carried out, because of the heterogeneity of results. However, with the narrative analysis, we can hypothesise that there may be a link between
external heat exposures to only high temperatures (represented by the metal industry) and testicular cancer. There must be a threshold for which heat exposures could be at higher risk of testicular cancer. That "heat threshold" remains to be explored and should integrate parameters such as an exposure duration and a wet index (because wetness is known to
fluctuate heat perception).”
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