Fig 2.

A, Punch biopsy from the upper portion of the back demonstrating an atrophic epidermis with vacuolar interface dermatitis, mild perivascular lymphocytic infiltrate with rare eosinophils, and increased dermal mucin deposition. B, Biopsy of the mucosal epithelium revealed hyperkeratosis, hypergranulosis, and a moderately dense, lichenoid infiltrate that focally obscured the basal layer of the epidermis, producing dyskeratotic keratinocytes and a few colloid bodies. (A and B, Hematoxylin-eosin stain; original manifications: A, 200×; B, 100×).