Hemochromatosis screening: Difference between revisions
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==Overview== | ==Overview== | ||
Routine [[screening]] of the general population for hereditary hemochromatosis, that is, by genetic testing, has been evaluated by the US Preventive Services Task Force (USPSTF), among other groups. In case-finding for hereditary hemochromatosis, serum ferritin and transferrin saturation tests should be performed. Genotyping and liver biopsy is suggested in cases which strongly suggest hemochromatosis due to high levels of serum ferritin and transferrin saturation. | |||
==Screening== | ==Screening== | ||
Revision as of 03:19, 9 November 2017
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Risk calculators and risk factors for Hemochromatosis screening |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Sunny Kumar MD [2]
Overview
Routine screening of the general population for hereditary hemochromatosis, that is, by genetic testing, has been evaluated by the US Preventive Services Task Force (USPSTF), among other groups. In case-finding for hereditary hemochromatosis, serum ferritin and transferrin saturation tests should be performed. Genotyping and liver biopsy is suggested in cases which strongly suggest hemochromatosis due to high levels of serum ferritin and transferrin saturation.
Screening
Screening specifically means looking for a disease in people who have no symptoms. Diagnosis, on the other hand refers to testing people who have symptoms of a disease. Standard diagnostic measures for haemochromatosis, serum transferrin saturation and serum ferritin tests, are not a part of routine medical testing. Screening for hemochromatosis is recommended if the patient has a parent, child or sibling with the disease, or have any of the following signs and symptoms:[1][2]
- Joint disease
- Severe fatigue
- Heart disease
- Elevated liver enzymes
- Impotence
- Diabetes
Routine screening of the general population for hereditary hemochromatosis, that is, by genetic testing, has been evaluated by the US Preventive Services Task Force (USPSTF), among other groups. In case-finding for hereditary hemochromatosis, serum ferritin and transferrin saturation tests should be performed. The USPSTF recommended against doing genetic testing to screen the general population for hereditary hemochromatosis because the likelihood of diagnosing clinically relevant, iron accumulating hereditary hemochromatosis in a treatable patient population approaches less than 1 in 1000 unselected patients. Also, there is no evidence that doing phlebotomy to treat asymptomatic, non-iron overloaded carriers of HFE mutations has any clinical benefit. Also, genetic carriers of the disease may never manifest the symptoms of the disease, so that the potential harm of the attendant surveillance, privacy issues, unnecessary invasive work-up, and anxiety outweigh the potential benefits. [3] [4]
Screening and diagnosis of hemochromatosis.WT, wild type; HII, histologic iron index; CII, chemical iron index; HH, hereditary hemochromatosis[5]
| Serum Transferin Saturation TS | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| <50% premenupasal females <60% men, postmenupasal women | ≥50% premenupasal females ≥60% men, postmenupasal women | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1 Repeat Transferin Saturation TS 2 Serum Feretin SF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Repeat testing every 5 year | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| TS:<50% premenupasal females TS: <60% men, postmenupasal women SF: 20-250μg/L premenupasal females SF: 10-120μg/L men, postmenupasal women | TS:≥50% premenupasal females TS: ≥60% men, postmenupasal women SF:>200 μg/L premenupasal females SF:>300 μg/L men, postmenupasal women | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Repeat TS and SF every 2-3 year | Serum Feretin<1000 μg/L | Serum Feretin>1000 μg/L | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Geno-typing | Liver biopsy | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| WT/WT genotype | C282Y/WT genotype | C282Y/H63D genotype | C282Y/C282Y genotype | Histological iron index<0.15 Chemical iron index<2.0 | Histological iron index>0.15 Chemical iron index>2.0 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Secondray hemochromatosis | Phelebotomy to maintain Serum Feretin | Repeat TS and SF after 2-3 year | Phelebotomy to maintain Serum Feretin | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Screen family with Transferin Saturation & Serum Feretin if atypical HH suspected | Screen family with genotyping | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Moniter Transferin Saturation & Serum Feretin in subclinical members | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
References
- ↑ Screening and Diagnosis Mayo Foundation for Medical Education and Research (MFMER). Retrieved 18 March, 2007
- ↑ [http://www.annals.org/cgi/content/full/143/7/I-46 Screening for Hereditary Hemochromatosis: Recommendations from the American College of Physicians Annals of Internal Medicine (2005) 4 October, Volume 143 Issue 7. (Page I-46). American College of Physicians. Retrieved 18 March, 2007
- ↑ "Screening for hemochromatosis: recommendation statement". Ann. Intern. Med. 145 (3): 204–8. 2006. PMID 16880462.
- ↑ Screening for Hemochromatosis U.S. Preventive Services Task Force (2006). Summary of Screening Recommendations and Supporting Documents. Retrieved 18 March, 2007
- ↑ Bacon BR (2012). "Hemochromatosis: discovery of the HFE gene". Mo Med. 109 (2): 133–6. PMID 22675794.