1 - Scheme Overview

This external quality assessment allows the control of immunoassays with markers – specialized tumor markers, with an inter-laboratory comparison by peer group

Statistical reports are sent with supporting comments from the expert clinical biologists who coordinate the scheme.

Participating labs can choose to be assessed for all the analytes of this scheme, or simply a subset of analytes of interest.

2 - Assessment Frequency

Number of surveys per year: 6
Number of control samples per survey: 2
Number of samples per year: 12

3 - List of Analytes Assessed

• CA 72-4
• Cyfra 21-1
• NSE
• free βhCG subunit
• Thyroglobulin

4 - Description of the Control Samples

Lyophilized human control serum (samples to be resuspended in 1 mL of distilled water).