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Directions for clinical practice improvement in HFE gene mutation testing.
Melissa J Gillett1, Cyril D Mamotte, David Ravine
1PathWest-Royal Perth Hospital, Perth, WA, Australia.
The Medical Journal of Australia
|September 19, 2007
Summary
Many HFE gene mutation tests are requested without appropriate clinical justification, indicating a need for better physician education on genetic testing guidelines. This audit highlights potential improvements in diagnostic test utilization.
Area of Science:
- Medical Genetics
- Clinical Diagnostics
- Molecular Pathology
Background:
- HFE gene mutations are associated with hereditary hemochromatosis, a disorder of iron overload.
- Accurate clinical indications are crucial for appropriate HFE gene mutation testing.
- Previous audits have suggested variability in the appropriate use of genetic testing.
Purpose of the Study:
- To audit the clinical indications for HFE gene mutation testing.
- To assess the compliance of HFE test requests with established clinical guidelines.
- To identify areas for improvement in the request and reporting process for HFE genetic testing.
Main Methods:
- A retrospective audit of 187 consecutive HFE test requests.
- Review of request forms, hospital notes, and information from referring physicians.
- Assessment of reasons for testing against accepted clinical indications (iron overload or family history).
Main Results:
- Insufficient clinical details were provided in 37% of requests, hindering interpretive comments.
- Over half (57%) of auditable HFE test requests were based on reasons other than biochemical iron overload or family history.
- A significant proportion of requests did not meet established criteria for HFE gene mutation testing.
Conclusions:
- A substantial number of HFE genotype test requests are made for inappropriate clinical reasons.
- Improved physician education on the utility of HFE testing is warranted.
- Laboratories should enhance efforts to obtain necessary clinical information for accurate test interpretation.
