<unk>  is an infection of the skin typically caused by Pseudomonas aeruginosa. It is often seen in immunocompromised patients such as those with neutropenia.<unk>  presents as a round or oval lesion, 1 to 15cm in diameter, with a halo of erythema. A necrotic center is usually present with a surrounding erythematous edge, representing where the organism invaded blood vessels and caused infarctions. These ulcerous lesions are single or multiple and heal with scar formation, although sepsis resulting from other gram negative bacteria can also cause this condition.
Ecthyma gangrenosum
Lichen myxedematosus
Granuloma faciale
Epidermolysis bullosa
Folliculitis decalvans
Herpetic sycosis
Cutaneous larva migrans
Lymphogranuloma venereum