IL4 and eosinophilic pneumonia: Specific retrieval terms included: (dupilumab) or (IL-4Rα) or (IL-4/IL-13) AND “Eosinophilic Pneumonia” or “EP” or “Pneumonia.” Including our own case, there were 13 patients in total, consisting of four men and nine women, aged between 37 and 71 years (mean age: 56.46 ± 9.25).