Expression of ERRs has been previously studied in benign (lichen sclerosus et atrophicus, LSA), precancerous, and malign vulvar epithelium.14 However, previous data are available on ERR isoform expression in vulvar vestibulum neither of healthy women (i.e., no dermatological or pain problems) nor of women suffering from LPV. The gene discussed is SLC7A1; the disease is lichen sclerosus et atrophicus.