Figure 2.

Dermatopathological results. (A) Intact blister beneath the epidermis (original magnification ×25); (B) a small number of inflammatory cells infiltrated the blister (original magnification ×100); (C) linearly arranged segmental homogeneous caterpillar bodies, similar to keratinized imperfect cells, were seen in the blister walls (original magnification ×400); (D) gelatinous milia-like helioelastic tissue degeneration was seen at the bottom of the blister (original magnification ×200); (E) the intact dermal papillae protruded into the blister in the form of colored spheres (original magnification ×400); (F) sparse hyaline material was seen around the vessels of the dermal papillae (original magnification ×400). Specific pathological features are indicated by black arrows.