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Painful Leg Ulcer in Seropositive RA

A 48-year-old woman with seropositive rheumatoid arthritis presents with this solitary, rapidly expanding and very painful (analog scale 9 out of 10) ulcer on the pretibial surface of her leg. Can you choose the correct diagnosis from the differentials?



A 48-year-old woman with seropositive rheumatoid arthritis presents with this solitary, rapidly expanding and very painful (analog scale 9 out of 10) ulcer on the pretibial surface of her leg.

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Answer: D. Pyoderma gangrenosum

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