Figure 1: (A) Edematous patches, grey patches and necrosis (white arrows) on the right hand of a 52-year-old man, caused by contact with hydrofluoric acid. (B) Histopathology of a skin lesion showing poorly defined tissue structures of the full-layer dermis owing to severe liquefactive necrosis (hematoxylin and eosin stain. Original magnification × 100).