Inflammatory papules, pustules, nodules, or plaques (early disease) |
Infections |
Folliculitis, furuncles, or carbuncles (bacterial, viral, or fungal) |
Cellulitis or cellulitis-like lesions (bacterial, mycobacterial, or fungal) |
Arthropod bite reaction |
Lymphoma (cutaneous T and B cell) |
Panniculitides (inflammatory, infectious, neoplastic, metabolic) |
Iododerma |
Bromoderma |
Ulcers and vegetative lesions (later disease) |
Infections |
Bacterial infections - botryomycosis, streptococcal synergistic gangrene, ecthyma gangrenosum, gummatous treponemal ulcers |
Fungal infections - lesions associated with deep mycosis (blastomycosis, chromomycosis , coccidioidomycosis, paracoccidioidomycosis) |
Mycobacterial infections - atypical and typical mycobacteria |
Parasitic infections - leishmaniasis, amoebiasis, schistosomiasis |
Vascular disorders |
Vasculitis - cutaneous polyarteritis nodosa, microscopic polyangiitis, granulomatous vasculitides, autoimmune connective tissue disease, Behçet's disease |
Ulcers related to: |
Venous hypertension |
Arterial insufficiency |
Hemoglobinopathies |
Non-septic emboli |
Hypercoagulopathic thrombosis |
Malignancy |
Nonmelanoma skin cancer (squamous cell or basal cell carcinoma) |
Cutaneous T or B cell lymphoma |
Other |
Brown recluse spider bite |
Necrobiosis lipoidica with ulceration |
Blastomycosis-like pyoderma |
Pemphigus vegetans |
Self-induced (factitial) ulcer |
Hydroxyurea-induced ulcer |