SDC1 and cholesteryl ester measurement: Intriguingly, McQueen et al. [36] reported that the detection of “endometrial stromal changes” (characterized by the spindling of cells, edema, breakdown, pigment deposition, areas of hypercellularity, and the presence of lymphocytes, eosinophils, neutrophils, and histiocytes), along with CD138(+) ESPCs, could potentially reduce the false-positive rate in the histopathologic diagnosis of CE.