Regarding 99mTc‐HYNIC‐αLAG‐3, LAG‐3+ A549 tumors presented an average ex vivo tumor uptake of 15.5 ± 2.4 %ID/g, in vivo tumor uptake of 5.3 ± 0.7 %ID/cc, and LAG‐3 expression level of 73.3 ± 10.0%, while these values became 5.3 ± 1.1 %ID/g, 2.8 ± 0.2 %ID/cc, and 2.1 ± 0.2%, respectively, for LAG‐3− A549 tumors (Figure 4c; n = 3). The gene discussed is LAG3; the disease is neoplasm.