Epidermal growth factor receptor inhibitors(EGFRi) and Mitogen Activated Kinase inhibitors(MEKi) induce a folliculitis in 65-80% of patients, but it is unclear how they impact on the human hair follicle(HF). We have asked whether EGFRi/MEKi-induced associated with damage HFs immune privilege(IP) excessive HF secretion pro-inflammatory mediators. Scalp biopsies were taken from EGFRi-treated pati...