Abstract
Cases of the acquired form of angioedema have been recognized as a separate entity since 1972. Previously reported cases have been related to various hematologic malignancies. We have recently studied a patient with rectal carcinoma who manifests a complement pattern compatible with the acquired form of angioedema. No previous personal or family history of allergic disease or angioedema was present. Because the episodes of angioedema were laryngeal in location and required emergency intubation to maintain an adequate airway, a trial of danazol prophylaxis, which has been shown to be effective in hereditary angioedema, was undertaken. His beneficial response to this form of therapy is also documented.
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