# Hyperferritinemia
Nonspecific measure of inflammation, with common etiologies including infection, autoimmune, malignancy, renal failure, and liver failure. Extreme hyperferritinemia (greater than 5x upper limit of normal) still nonspecific, but warrants considering Stills, HLH, infection in immunocompromised host (e.g., crypto, histo), and hemochromatosis.
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