KISS1R and eosinophilia-myalgia syndrome: In addition, according to the immunohistochemical results of control endometrium of non-transplanted control mice and EU in EMs patients, we found differences in the expression of KISS1R and KISS1 in the EU of EMs mice compared to the endometrium of non-transplanted control mice, with a significant decrease in KISS1R and not in KISS1 (Fig. 2C).