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A member asked:
Complement c3 & c4 tests done 3 times. c3 normal but twice c4 was borderline normal or borderline low, 3rd time it was well within range. deficiency?
A doctor has provided 1 answer
Why the tests?: If the values were either borderline low or borderline normal, then one would call the value low normal. Whether it means anything or not would depends on whether you have a disease condition associated with complement consumption. A low C4 is usually found in patients with hereditary angioedema.
Answered 1/24/2017
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