What is necrolytic migratory erythema?

Necrolytic migratory erythema is a characteristic rash usually occurring in the glucagonoma syndrome. Glucagonoma syndrome is due to a slow-growing cancerous tumour located in the alpha cells of the pancreas. Glucagonoma is very rare and affects adults over the age of 50. The tumour secretes excessive amounts of the hormone glucagon.

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Source: dermnetnz.org