Article
An evaluation of tests used for the diagnosis and monitoring of C1 inhibitor deficiency: normal serum C4 does not exclude hereditary angio-oedema.
Clinical and experimental immunology - 1 Sept 2007
Tarzi M D, Hickey A, Förster T, Mohammadi M, Longhurst H J
Abstract excerpt
Reduced levels of serum C4 have been considered a ubiquitous finding in hereditary angio-oedema (HAE), and consequently low C4 is often used to 'request manage' access to C1 inhibitor assays in the United Kingdom. However, in our experience normal C4 may occasionally be compatible with HAE. We au...
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