MKI67 and neoplasm: By contrast, the Ki67 index (ρ = −0.535, P = .007), serum TSH (ρ = −0.39, P = .033), the largest tumour diameter (ρ = −0.442, P = .015) and tumour volume (ρ = −0.419, P = .027) all correlated negatively with treatment response.