FTH1-related iron overload

FTH1-related iron overload, also known as hereditary hyperferritinemia with iron overload or hemochromatosis type 5, is an extremely rare genetic disorder caused by mutations in the FTH1 gene, which encodes the ferritin heavy chain (H-ferritin). Ferritin is the major intracellular iron storage protein, and the heavy chain subunit plays a critical role in iron sequestration through its ferroxidase activity. Mutations in FTH1 lead to abnormal iron metabolism, resulting in excessive iron accumulation in various organs and tissues. The condition primarily affects the liver, heart, and other organs where iron deposition can cause progressive damage. Key clinical features include markedly elevated serum ferritin levels and evidence of iron overload on tissue examination. Patients may develop hepatic iron overload with potential liver dysfunction, and cardiac involvement may also occur. The clinical presentation can overlap with other forms of hereditary hemochromatosis, making genetic testing important for accurate diagnosis. Treatment approaches are similar to those used in other forms of iron overload and may include therapeutic phlebotomy (regular blood removal to reduce iron stores) or iron chelation therapy in cases where phlebotomy is not feasible. Management requires regular monitoring of serum ferritin levels, transferrin saturation, and organ function to prevent complications from progressive iron deposition. Given the extreme rarity of this condition, management is largely guided by experience with other hereditary hemochromatosis subtypes and expert clinical judgment.

Common questions about FTH1-related iron overload