CD274 and Miyoshi myopathy: Limited literature data are instead available on PD-L1/PD-1 expression on myeloid compartments in relation with the disease stage, which anyway show no differences in terms of PD-L1 expression on MDSCs between newly diagnosed (MMD) and relapsed (MMR) MM patients, without comparing the results with healthy controls or patients at early stages of disease (7, 16).