Pyoderma gangrenosum: An important dermatologic condition occasionally associated with rheumatic diseases

Figure 1 Clinical features of pyoderma gangrenosum involving lower legs. Ulcerative type (A), bullous type (B), pustular type (C), and vegetative type (D).

Figure 2 Pyoderma gangrenosum arising on rare sites, such as the toes (A), scalp (B) and glans (C).

Figure 3 Pyoderma gangrenosum triggered by caesarean operation (A), which was surgically treated by mesh grafting with oral prednisolone (B).