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Component of the classical complement pathway. Low levels suggest complement activation, hereditary angioedema, or lupus.
Component
Complement C4
System
Blood
Unit
mg/dL
Reference Range
10 – 40 mg/dL
LOINC Code
4498-2
Category
Immunology
MedExtract automatically maps Complement C4 results to LOINC code 4498-2 from any Spanish lab report.
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