The lesional psoriasis‐like areas of the mouse IFE displayed a mosaic pattern of cells expressing c‐Jun/JunB, which is highly reminiscent to the observed variability in expression of JUNB/c‐JUN in psoriatic plaques of patients (Haider et al, 2006; Park et al, 2009; Guinea‐Viniegra et al, 2014). The gene discussed is JUN; the disease is psoriasis.