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. 2016 Jan 14;2(1):22–24. doi: 10.1016/j.jdcr.2015.11.013

Fig 2.

Fig 2

Histopathologic sections from punch biopsy specimen. A large epidermal ulcer is evident with vertically oriented collagen fibers (arrow) extruding from the dermis into the overlying thick scale-crust. (Hematoxylin-eosin stain.)