Extreme Hyperferritinemia Diagnosis and Management

Introduction to Hyperferritinemia

The American College of Physicians recommends that ferritin levels >7500 μg/L demand urgent evaluation for life-threatening conditions, such as hemophagocytic lymphohistiocytosis (HLH), hematologic malignancy, or severe systemic infection, as these conditions are more likely than iron overload 1.

The American College of Rheumatology suggests using the HLH-2004 diagnostic criteria to assess for hemophagocytic lymphohistiocytosis, which includes fever, splenomegaly, cytopenias, hypertriglyceridemia, hemophagocytosis, low/absent NK cell activity, and elevated soluble IL-2 receptor (sCD25) 2, 3.

The American Association for Clinical Chemistry recommends a complete metabolic panel with liver function tests, including AST, ALT, alkaline phosphatase, bilirubin, and albumin, to evaluate for liver disease and hepatocellular necrosis 1.
Inflammatory markers, such as CRP and ESR, should be quantified to assess systemic inflammation, and elevated inflammatory markers with extreme ferritin suggest secondary hyperferritinemia 1.
Transferrin saturation (TS) should be measured, and if TS <45%, iron overload is excluded and secondary causes predominate 1.

The American College of Radiology recommends CT chest/abdomen/pelvis with contrast to evaluate for lymphadenopathy, splenomegaly, hepatomegaly, or liver pathology 1.
Bone marrow biopsy is essential if hematologic malignancy or HLH is suspected, to evaluate for hemophagocytosis and assess for acute leukemia, lymphoma, or other hematologic malignancy 2, 3.

The American Medical Association advises against assuming iron overload with ferritin >7500 μg/L, as extremely high ferritin rarely represents simple iron overload, and checking transferrin saturation can help exclude iron overload 1.
Delaying evaluation for life-threatening conditions, such as HLH, malignancy, or severe infection, can be fatal, and hematologic malignancies require prompt diagnosis for treatment planning 1, 2, 3.