“…The reported histologic descriptions 2,7,8,11,13,25,26,32,34,35,38,[42][43][44] of the KPA entities are often vague and nonspecific, but in some cases clearly represent LF (Figures 1 and 2 Images from at least some reports show changes of an interface dermatitis with vacuolar alteration of the basilar layer. 8,34,38,44 The lack of histologic specificity may be due to the stage of disease biopsied, reliance on vertical sectioning, or sampling error. When advanced or end-stage disease is selected for biopsy, diagnostic changes will not be found.…”