Pyoderma gangrenosum (PG) is a rare, immunological ulcerative, and necrotic inflammatory skin disease that can be easily misdiagnosed as cellulitis, abscess, diabetic foot ulcer, and other infectious diseases. Misdiagnosing PG leads to unnecessary surgical incision and debridement, which further exacerbates the lesion, ultimately leading to longer treatment periods and higher medical costs. Therefore, early and accurate diagnosis of PG is extremely important for its treatment. In particular, PG should be suspected in patients with inflammatory bowel disease.
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