[Hereditary and acquired iron overload].

Area of Science:

• Medical Genetics
• Hepatology
• Internal Medicine

Background:

• Hereditary hemochromatosis involves iron metabolism abnormalities, with five known types.
• Type 1, caused by HFE gene mutations, is most common in France.
• Secondary iron overload can stem from various conditions, including genetic diseases and liver issues.

Purpose of the Study:

• To review the diagnosis and management of hereditary hemochromatosis.
• To differentiate HFE-related hemochromatosis from other causes of iron overload.
• To emphasize early intervention strategies for preventing complications.

Main Methods:

• Review of known hereditary hemochromatosis types and secondary causes of iron overload.
• Discussion of diagnostic challenges, including interpreting serum ferritin levels.
• Emphasis on HFE mutation testing and hepatic MRI for iron overload assessment.

Main Results:

• HFE C282Y +/+ mutation is the most frequent cause of hemochromatosis.
• Elevated serum ferritin requires careful evaluation alongside transferrin saturation to rule out other conditions.
• Hepatic MRI is preferred over liver biopsy for iron overload assessment.

Conclusions:

• Phlebotomy is the primary treatment for HFE hemochromatosis to reduce iron overload.
• Early venesection, guided by serum ferritin levels, is vital to prevent irreversible complications like cirrhosis and diabetes.
• Identifying rare hemochromatosis types is reserved for specific clinical scenarios.