MAPK14 and polyostotic fibrous dysplasia: Another study revealed that PFD might have the potential to reduce the generation of proinflammatory cytokines by stopping the action of p38 MAP Kinase in B lymphocytes, introducing a new potential in PFD for lung fibrosis, as migration and activation of fibroblasts can occur due to the inflammatory process started by B‐cell‐derived cytokines.53