ERBB2 and neoplasm: In each case, the results were the same: F/B from tumor-stroma interface is significantly higher than F/B from tumor bulk in both HER2+ (F/B = 8.95 ± 0.63 versus 6.51 ± 0.55; paired t-test, p = 0.0004 and TNBC core needle biopsies.