What is your approach to discordant dsDNA testing, such as positivity to dsDNA by crithidia but negativity to dsDNA by other modalities?
I get a lot of low false positive ds dna (sometimes high- 300) in quest and labcorp but their crithidia specific dsDNA labs when repeated are negative. Patients do not meet specific criteria for lupus, but some have inflammatory arthralgia/arthritis.
Answer from: at Community Practice
What a great question with many facets. The information I provide is meant to be very practical. These answers are from the viewpoint of a rheumatologist and not an immunologist. I discussed this subject with Dr. Debra Zack, a rheumatologist/immunologist who is an expert with anti-dsDNA, and I had t...
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