To date, there are no specific clinical trials on this point, as they are very costly and time-consuming to carry out. They will come once certification has been obtained, in the form of large-scale health monitoring.
Testicular cancer is often multifactorial, has a good prognosis, and is triggered fairly late after exposure to a risk. It is very difficult to target heat specifically to determine the potential carcinogenic effect. On the other hand, other factors, such as pollution as a whole, are no longer in question.
We know that exposure to body heat does not cause irreversible cellular damage. We also know that many professions are exposed to high heat on a daily basis without triggering cancer. We also know that there have been no reports to the health authorities of an increase in cancer among people who have used the thermal method.
To go further and continue to highlight areas where we lack solid knowledge, a meta-analysis has been carried out by the cooperative's medical task force on this subject. It will be published shortly. Here are its conclusions:
2022 - Entrelac.coop medical task force
Is there evidence of a link between exposure of pubertal testes to supra-scrotal temperatures equivalent to body heat and the risk of testicular cancer? A narrative review.
->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."
2023 Carton's Thesis of Medicine and Pharmacy "Does extracorporeal heat constitute a risk of testicular cancer? Systematic review and meta-analysis"
-> "Conclusion and perspectives:
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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