MKI67 and neoplasm: In group TC, the Ki-67 proliferation index ranged from 2% to 54.2% (mean [SD]: 19.1 [14.4] %); 14 tumours displayed high Ki-67 indexes (≥14%, cut-off value according to Soares et al. 34), while the remaining 11 showed low Ki-67 scores (<14%).