CD274 and lung carcinoma: However, previous preclinical data confirmed high specificity of [99mTc]NM-01 for PD-L1 [8], our previous study demonstrated good correlation with immunohistochemistry PD-L1 in lung cancer patients [9] and this current study showed high myocardial activity compared to striated muscle, which all provide strong indirect evidence of PD-L1 specificity in the myocardium for [99mTc]NM-01.