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Plasma from 27 women with silicone breast implants (SBIs) and 50 age-matched control women without SBIs were examined by enzyme immunoassay for the presence of interleukin-1 beta (IL-1 beta) and its naturally occurring receptor antagonist, IL-1ra. The results show that 74% (20 of 27) of women with SBIs had elevated concentrations of IL-1ra, whereas only 2% (1 of 50) of controls without SBIs had elevated concentrations of IL-1ra. In contrast to the IL-1ra results, the frequency of elevated IL-1 beta concentrations among women with SBIs was only 40% (11 of 27), but this was significantly higher than the 0% (0 of 50) in control women without SBIs. These findings suggest that there is a chronic ongoing inflammatory process in some women with SBIs, the implications of which are discussed in the context of silicone as an antigenic stimulant of the immune system.

Elevated concentrations of interleukin-1 beta and interleukin-1 receptor antagonist in plasma of women with silicone breast implants