Decoding the Link Between Talcum Powder and Ovarian Cancer: A Comprehensive Review

Ovarian cancer (OC) is a highly lethal gynecologic malignancy, frequently diagnosed at advanced stages due to its silent onset and nonspecific clinical presentation. The use of talc-containing powders in the genital area has long been suspected to contribute to the development of OC through inflammatory and irritative pathways; however, the association remains controversial. This scoping review aims to decode the link between talc powder exposure and ovarian cancer by synthesizing findings from epidemiologic studies, public awareness surveys, and laboratory investigations. Epidemiologic analyses reveal that the use of genital powders is associated with a, modestly, 30-32% increase in the risk of OC, with similar risk patterns observed across racial subgroups. In contrast, studies on uterine cancer yield largely null associations after adjusting for confounders. Awareness surveys consistently report that only about 23% of respondents recognize talc use as a risk factor. Laboratory studies demonstrate that the dominant class of talc particles in commercially available powders-characterized by an aspect ratio of 1-3.9 and an area of 1-400 μm²-is nearly identical to those retrieved from pelvic tissues in OC patients, supporting the hypothesis of migration via retrograde and lymphatic pathways. The collective evidence supports the biological plausibility that talc from genital powders can migrate to pelvic tissues and potentially foster oncogenic inflammation. Further methodologically rigorous prospective and mechanistic studies are warranted to clarify the causal relationship and inform targeted public health and regulatory interventions.