[89Zr]Zr-DFO-ATL2 is a promising radiotracers in terms of effectively displaying PD-L2 expression in tumor tissue with relatively low injection doses and high SUVmax values, which injection dose is only 1.85 MBq, but the SUVmax value of tumor tissue detection can be as high as 3.53 ± 0.09. The gene discussed is PDCD1LG2; the disease is neoplasm.