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A member asked:
Does c3 & c4 have to be low to indicate lupus. my c3 was the only one low. i also had positive ana & i had more blood work done, but not back yet.
A doctor has provided 1 answer
No single test: C3 is low more often than C4 in lupus but both can be normal. It is a diagnosis made on checklist -- point count. Best wishes.
Answered 5/31/2016
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