A Search for Uniformity in Human Chorionic Gonadotropin (hCG) Reporting

Area of Science:

• Clinical Chemistry
• Immunodiagnostics
• Laboratory Medicine

Background:

• Harmonization in laboratory testing ensures consistent results across different facilities and equipment.
• Lack of harmonization can negatively impact patient care and diagnostic accuracy.

Observation:

• A case study revealed significant discrepancies in serum human chorionic gonadotropin (hCG) levels for a single patient sample tested on two different immunoassay platforms within the same laboratory.
• This inconsistency highlights the critical issue of non-harmonized diagnostic assays.

Findings:

• The primary causes for non-uniformity in hCG results include the use of antibodies targeting different epitopes and inherent heterogeneity of the hCG molecule.
• These factors lead to assay variability, compromising the reliability of diagnostic information.

Implications:

• Harmonizing laboratory tests is crucial for ensuring that healthcare providers can confidently utilize clinical guidelines for accurate disease diagnosis and patient management.
• Standardized testing procedures enhance the continuity and quality of patient care by providing dependable diagnostic data.