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Pyoderma gangrenosum is a rare, inflammatory skin disease where painful pustules or nodules become ulcers that progressively grow. [3] Pyoderma gangrenosum is not infectious. [3] Treatments may include corticosteroids, ciclosporin, infliximab, or canakinumab. [2] The disease was identified in 1930.
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).
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.
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 .
Pyoderma gangrenosum. Acute erythema nodosum; Bowel-associated dermatosis–arthritis syndrome (bowel bypass syndrome, bowel bypass syndrome without bowel bypass, intestinal bypass arthritis–dermatitis syndrome) Marshall syndrome; Neutrophilic dermatosis of the dorsal hands (pustular vasculitis of the dorsal hands) Neutrophilic eccrine ...
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. [2]
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]
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.