Rheumatoid Factor Interference in Dual Immunoassays: False-Positive Procalcitonin and CK-MB Results.

Clinical Laboratory
|April 14, 2026
PubMed
Summary

High rheumatoid factor (RF) levels can cause falsely elevated procalcitonin (PCT) and CK-MB immunoassay results. Testing on alternative platforms and using RF blocking agents can help correct these interferences and prevent misdiagnosis.

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