PAX8 and Mayer-Rokitansky-Kuster-Hauser syndrome: PAX8 staining confirmed that the endometrial epithelium of MRKH patients had all the morphological features of a normal endometrium, showing tubular and frequently branching glands with a single layer of columnar epithelium (Fig. 1D), as it has been shown recently in an extensive histology study of MRKH rudiments (Rall et al., 2013).