Hereditary hemochromatosis

Area of Science:

• Genetics
• Gastroenterology
• Endocrinology

Background:

• Hereditary hemochromatosis is an autosomal recessive disorder affecting iron regulation, most prevalent in individuals of Northern European descent.
• Men exhibit a significantly higher incidence of iron overload compared to women.
• The C282Y mutation in the HFE gene is responsible for 85-90% of hereditary hemochromatosis cases.

Purpose of the Study:

• To provide a comprehensive overview of hereditary hemochromatosis, including its genetic basis, clinical manifestations, diagnostic approaches, and management strategies.
• To highlight the importance of early diagnosis and appropriate treatment to prevent end-organ damage.

Main Methods:

• Diagnosis relies on elevated serum ferritin and transferrin saturation levels, confirmed by genetic testing for HFE gene mutations.
• Serum ferritin levels serve as a key prognostic indicator of disease severity.
• Liver biopsy may be utilized for staging fibrosis or diagnosing nonclassical forms of the disease.

Main Results:

• Clinical manifestations, including arthralgias, cirrhosis, and diabetes, occur in about 10% of homozygous C282Y individuals.
• Phlebotomy is the cornerstone of treatment, with frequency adjusted based on serial ferritin and transferrin saturation monitoring.
• Dietary changes are generally not required, and universal screening is not recommended.

Conclusions:

• Hereditary hemochromatosis requires lifelong management, primarily through phlebotomy, to prevent complications.
• Testing is recommended for first-degree relatives of affected individuals and those with abnormal iron studies.
• Screening for hepatocellular carcinoma is indicated for patients with hereditary hemochromatosis and cirrhosis.