PDGFB and neoplasm: Quantification showed that p‐S6+ Iba1+ cells were extremely low in the non‐tumour tissue (ranging from 1% (± 0.2 SEM) in the GL261 model to 13.9% (± 7.4 SEM) in the PDGFB model), whereas co‐expression was more frequent in the tumour core (between 50% and 83%, with the PDGFB model at 83% (± 9.9 SEM) closely followed by the GL261 model at 71% (± 8 SEM); Fig 1B).