In the subset of patients with hormone receptor positive disease, 6170 lobular, 2094 lobular mixed and 32,393 ductal PBCs were included (of which 98.8% had ER+/HER2‐ PBC and 1.2% had ER unknown/PR+/HER2‐ PBC). This evidence concerns the gene ERBB2 and primary biliary cholangitis.