CD274 and non-small cell lung carcinoma: Single photon emission computed tomography (SPECT) imaging of NSCLC (non-small cell lung carcinoma) with a 99mTc-labeled sdAb (99mTc-NM-01) that binds in a specific manner to human PD-L1 is feasible to use in correlation with PD-L1 immunohistochemistry results.