IL6 and toxic epidermal necrolysis: A significant difference in IL-6 expression was observed in the epithelium of pooled samples from SJS/TEN patients (average immunofluorescence [IF] intensity: 299 a.u.), lichen planus (LP) patients (average IF intensity: 241 a.u.), and normal controls (average IF intensity: 204 a.u.)(p < 0.0001).