ERBB2 and neoplasm: A strong positive correlation was found between IMA levels and CEA (r = 0.540, P < .001), and strongly positive correlations were found for IMA and the presence of metastasis (r = 0.740, P < .001), tumor grade (r = 0.846, P < .001), and the presence of HER2 (r = 0.734, P < .001).