Indeed, endometriosis is considered a pelvic inflammatory condition; in women with endometriosis, peritoneal fluid is characterized by an increased number of activated macrophages and high levels of pro-inflammatory cytokine/chemokine, such as tumor necrosis factor-α (TNFα) and interleukin-8 [3,4,5,6]. The gene discussed is CXCL8; the disease is endometriosis.