S100A6 and adenomyosis: The findings of Mehasseb et al. (2011), showing a non-significant increase in PR-A in adenomyosis lesion epithelium and, to a lesser extent, stroma, compared to the endometrial functionalis in the SP, contrast with the general trend, yet the observed discrepancy underscores the importance of considering both PR isoforms separately and examining different endometrial subregions.