• Venous insufficiency (70 = 80%) • Mix disease (Arterio = venous (10 = 14%)) • Arterial disease (2 = 5%) • Lymphatics (2 = 3%) • Vasculitis (rheumatoid arthritis, scleroderma, SLE, Wegener’s granulomatosis) • Neuropathic (diabetes, peripheral neuropathy) • Traumatic (burns, cold injury, radiation) • Neoplastic (squamous or basal cell carcinoma, Marjolin’s ulcer, melanoma) • Sarcoidosis • Pyoderma gangrenosum • Others |