Because tumour-associated macrophages display shifted arginine metabolism towards the production of ornithine and polyamines via arginase27 along with high levels of scavenger receptors,28 we thought to measure by qPCR, whether the levels of ARG1 and the macrophage scavenger receptor MSR1 in the study population changed during the treatment (baseline vs T2/T3). The gene discussed is MSR1; the disease is neoplasm.