Figure. 2. Histopathological findings
(a) Histopathological findings of the erythema and bullae
(hematoxylin-eosin stain, ×40). Subepidermal blistering accompanied by
eosinophilic infiltration is evident. (b) Findings of direct
immunofluorescent assay (×200). Immunoglobulin G is deposited in the
basement membrane zone. (c) Immunohistochemical analysis in the active
lesion using anti-FoxP3 antibody (Thermo Fisher Scientific, Rockford,
IL). A few positive cells are shown (×400). (d) Immunohistochemical
analysis in the inactive lesion using anti-FoxP3 antibody. Several
positive cells are shown (×400). (e) Immunohistochemical analysis in the
intact skin using anti-FoxP3 antibody. Few positive cells are shown
(×400).