RT @drdavidliew: Very high serum IgG4 does not equal IgG4-related disease. Most of the time (3/4 in this sample), IgG4&
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Very high serum IgG4 does not equal IgG4-related disease.
Most of the time (3/4 in this sample), IgG4>5xULN is IgG4-RD.
Some of the time, it's not. (Could be a long list of things)
Criteria are useful
High serum IgG4 alone isn't enough
@zach_wallace_md #ACR21 ABST1103 @RheumNow https://t.co/oxMgnnpIce
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