New Criteria for the Classification of Rheumatoid Arthritis


New ACR/EULAR 2010 Classification Criteria for Rheumatoid Arthritis (RA)

European and American rheumatologists have established new criteria for the classification of rheumatoid arthritis (RA). The Revised Classification Criteria for Rheumatoid Arthritis will appear in the September issue of Arthritis & Rheumatism; they can also be viewed online or as a free download at the ACR homepage (accessed 23/08/2010). Continue reading

Blood Tests for the Diagnosis of Lupus


Blood Tests for the Diagnosis of Lupus

Welcome to our Autoimmunity Blog! The subject of this post is blood tests for the diagnosis of lupus.  

Lupus facial rash in a typical wolf-like distribution.

Lupus facial rash in a typical wolf-like distribution.

The emphasis of this article is on the detection of autoantibodies relevant to the diagnosis of SLE. Specifically, this includes detection of ANA (antinuclear antibodies) by immunofluorescence and individual tests for various ANA, including anti-dsDNA, anti-Sm, anti-U1RNP (also anti-U1-RNP or anti-RNP), and anti-histone, as well as anti-SS-A/Ro and anti-SS-B/La.  

Tests for ANA are also highly useful in differential diagnostics, especially when diseases with symptoms resembling SLE must be distinguished from lupus itself, for example fibromyalgia, infections like tuberculosis and HIV/AIDS, or certain malignant tumours, particularly lymphoma and leukaemia.  Continue reading