Condition	Characteristics
Venous stasis leg ulcer	Located in the gaiter area; shallow with irregular borders; surrounded by indurated, hyperpigmented skin
Arterial leg ulcer	Develops on the distal extremities, sharply demarcated, painful with little granulation tissue
Marjolin’s ulcer	Cancer arising from any site of chronic inflammation, most often found in burn scars; squamous cell carcinoma most common
Pyoderma gangrenosum	Painful; well-demarcated, undermined edges and purulent, dusky purple base; surrounding erythema and satellite pustules
Diabetic leg ulcer	Often painless, may be deep, surrounded by thick callus, and may be malodorous because of secondary infection