ERBB2 and neoplasm: Consistent with the significant Spearman's rho value, the distribution of cases with Gleason scores 4–5, 6, 7 and 8–10, respectively, was different for those with a tumour ErbB2-IR score ≤2.75 (40 [26%], 46 [30%], 26 [17%] and 41 [27%]) than those with a score >2.75 (21 [10%], 57 [28%], 40 [20%] and 86 [42%]) (P<0.0005, Chi squared test; values given are the number [% for the ErbB2-IR group] with the Gleason score range at diagnosis.