ERBB2 and primary biliary cholangitis: The converse was true for HER2; the levels were significantly higher at metastasis (median 12.2 ng/ml, range 5.7 to 85.0 ng/ml) than at presentation of PBC (median 17.7 ng/ml, range 6.3 to 3,337.4 ng/ml; P < 0.001).