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Also in support of an immune cause is the finding that at least half of all pyoderma gangrenosum patients suffer from immune-mediated diseases. [1] For instance, ulcerative colitis, rheumatoid arthritis, [4] and monoclonal gammopathies [13] have all been associated with pyoderma gangrenosum. It can also be part of autoinflammatory syndromes ...
Pyoderma gangrenosum is variably expressed, which means that it is not always present in all individuals with the disease. It presents as poorly healing ulcers with undermined edges. Pathergy is an important feature (this term refers to the tendency of ulcers to arise at points of injury).
Pyoderma means any skin disease that is pyogenic (has pus). These include superficial bacterial infections such as impetigo , impetigo contagiosa , ecthyma , folliculitis , Bockhart's impetigo , furuncle , carbuncle , tropical ulcer , etc. [ 1 ] [ 2 ] Autoimmune conditions include pyoderma gangrenosum .
The inflammation and ulceration that occurs as a result of pathergy in pyoderma gangrenosum often responds to systemic steroid therapy. The pathergy reaction is a unique feature of Behçet's disease and, according to the International Study Group for Behcet's Disease, is among the major criteria required for the diagnosis.
In superficial granulomatous pyoderma, ulcers typically have a clean base and vegetating borders, making them more superficial. Unlike pyoderma gangrenosum, superficial granulomatous pyoderma is more frequently associated with truncal involvement and is not always linked to underlying systemic disease.
Many conditions mimic or may be mistaken for warfarin necrosis, including pyoderma gangrenosum or necrotizing fasciitis. Warfarin necrosis is also different from another drug eruption associated with warfarin, purple toe syndrome, which usually occurs three to eight weeks after the start of anticoagulation therapy. No report has described this ...
Ecthyma gangrenosum is a type of skin lesion characterized by vesicles or blisters which rapidly evolve into pustules and necrotic ulcers with undermined tender erythematous border. " Ecthyma " means a pus forming infection of the skin with an ulcer, "gangrenosum" refers to the accompanying gangrene or necrosis.
A similar response occurs in pyoderma gangrenosum and Behcet's syndrome, and is referred to as pathergy. [3] Rarely Koebner phenomenon has been reported as a mechanism of acute myeloid leukemia dissemination. [4] Warts and molluscum contagiosum are often listed as causing a Koebner reaction, but this is by direct inoculation of viral particles. [3]