ERBB2 and adrenal cortex carcinoma: Finally, in the studies with a cut-off point of 50% for positive and 10% for negative results, the overexpression rate of HER2/neu in SDC was 33% (CI 95%: 13.1–62.4%), and the expression rate of HER2/neu in ACC was 2% (CI 95%: 0.2–31.0%).