PDL1 expression was not associated with OSS in our IBC series (p = 0.852, log-rank test; Figure 2B), whereas ERBB2 status was (p = 0.010) and ER and PR statutes tended to be associated with OSS (p = 0.057 and p = 0.053 respectively; Supplementary Table 3). Here, PGR is linked to inflammatory breast carcinoma.