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About 50% of cases of pyoderma gangrenosum (PG) are associated with a variety of systemic diseases. We describe a patient with severe PG on both legs who suffered from an autoimmune haemolytic anaemia in association with a congenital deficiency of complement factors C2 and C4. To the best of our knowledge, this constellation has not been previously reported.
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Coors et al. (2000) studied this question.
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