CD8A and metastatic malignant neoplasm in the lymph nodes: Different lymph nodes, which were described as suspicious for metastases in the previous routine [18F]FDG PET/CT performed five weeks earlier (e.g., the hilar lymph node metastasis), showed in this CD8 PET/MRI scan only weak [89Zr]Zr-Df-IAB22M2C uptake (SUVmean 2.8; Figure 2A), whereas axillary lymph node metastasis revealed intense [89Zr]Zr-Df-IAB22M2C uptake (SUVmean 6.6; Figure 2B).