Circulating inflammatory biomarkers and endometriosis lesion characteristics in the WisE consortium

Endometriosis is a chronic inflammatory condition requiring surgical or imaging visualization for definitive diagnosis. How endometriotic lesion characteristics relate to circulating inflammatory markers remains unclear. We evaluated 11 inflammatory biomarkers, including interleukin (IL)-1β, -6, -8, -10, -16, tumor necrosis factor (TNF)-α, thymus and activation regulated chemokine (TARC), monocyte chemotactic protein (MCP)-1, -4, and Interferon gamma-induced protein (IP)-10, in 566 participants with endometriosis from the Women's Health Study: From Adolescence to Adulthood (A2A), Endometriosis Oxford Care & Research (CaRe) study (ENDOX) and Endometriosis: Natural History, Diagnosis, and Outcome (ENDO) study to evaluate associations with endometriosis characteristics, including macrophenotype (superficial lesions only, versus endometrioma and/or deep lesions), lesion appearance (color, vascularity), and anatomic location. We observed nominally statistically significant variation in circulating inflammatory markers by lesion color, vascularity, and location but no significant associations between circulating inflammatory markers and rASRM stage or macrophenotype, which could be due to a small number of participants with non-superficial lesions.