Cytokeratin fragment 21-1, a tumor marker primarily used for monitoring non-small cell lung cancer and other epithelial tumors.
Category: Tumor Markers
Also known as: cyfra 21 - 1
Reference range: 0–3.3 ng/mL (Source: ABIM)
Standard unit: ng/mL
High values may indicate
Elevated levels may indicate presence of epithelial tumors, particularly non-small cell lung cancer, or disease progression.
Low values may indicate
Normal levels. No clinical concern.
Source: BloodId admin-reviewed
Track your CYFRA 21-1 over time with BloodId