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Figure 2: (a) Subepidermal bulla with numerous mast cells and inflammatory cells (H and E, ×100). (b) Dense infiltrate of mast cells in the dermis (H and E, ×200)

Figure 2: (a) Subepidermal bulla with numerous mast cells and inflammatory cells (H and E, ×100). (b) Dense infiltrate of mast cells in the dermis (H and E, ×200)