Histological analysis of necrosis (percentage of necrosis relative to the tumor area), cell proliferation with IHC labeling of Ki67 (expressed as a proliferation index), vascularization with IHC CD146 labeling, apoptosis with IHC cell labeling of caspase 3. Thresholds of significance: *: [0.05; 0.01 [, **: [0.01; 0.001 [, ***: ≤ 0.001.