PGR and Pyoderma gangrenosum-acne-suppurative hidradenitis syndrome: In known cases of PASH, the lesion size was shown to change with menses, consistent with a hormone-related fluctuation.1 In addition, PASH cases have shown strong stromal cell PR positivity and faint stromal nuclear reactivity for oestrogen was shown in one case, whereas the stromal cell nuclei of control cases without PASH did not stain for either receptor.6