PGR and ductal breast carcinoma in situ: Pure DCIS (n = 40) and DCIS associated with an invasive component (n = 45) cases were similar with respect to nuclear grade (non-high grade 57.9% versus 60%, respectively, P = 1.0), ER positivity (71.8% versus 64.1%, P = 0.63), and PR positivity (61.5% versus 53.8%, P = 0.65).