CD8A and neoplasm: Furthermore, their tumor uptake correlated to intratumoral CD8<sup>+</sup> T cells presence even though intratumoral distribution patterns differed significantly.<h4>Conclusion</h4>[<sup>89</sup>Zr]Zr-anti-CD8-IgG2a<sub>silent</sub> and [<sup>89</sup>Zr]Zr-OT-I PET/CT imaging can evaluate intratumoral CD8<sup>+</sup> T cell infiltration.