Serosal healing involves free-floating mesothelial cells [24, 25], and our results showed that macroscopic shed mesothelial cells float in clumps in the peritoneal fluid (Fig. 4E), wiht a 16-fold increase in SUCNR1 expression in the mesothelial cell mass of EMs patients (Fig. 4B,C). Here, SUCNR1 is linked to eosinophilia-myalgia syndrome.