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Image Number 344 (Pyoderma gangrenosum)


Diagnosis: Pyoderma gangrenosum

Site: Foot,dorsum

Sex: M

Age: 40

Type: Clinical

Description: Necrotic ulcers

Submitted by: Shahbaz Janjua

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Differential Diagnosis

History: Pyoderma gangrenosum (PG) was first described in 1930. It is an uncommon condition of unknown etiology characterised by an erythematous pustule or nodule progressing to become a necrotic ulcer with an undermined and violaceous edge. It commonly involves the lower extremities and trunk but less commonly head and neck. Pathergy is a characteristic feature of PG. In 50 % of cases, PG is associated with systemic diseases such as inflammatory bowel disease, hepatitis, or myeloproliferative disorders.

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