Evaluation of Ferritin 268 ng/mL
A ferritin level of 268 ng/mL requires immediate measurement of transferrin saturation (TSAT) to determine whether this represents true iron overload or an inflammatory/metabolic process, because ferritin alone cannot distinguish between these conditions. 1
Initial Diagnostic Approach
Measure transferrin saturation immediately to guide further evaluation: 1
If TSAT ≥ 45%: This indicates true iron overload and warrants HFE genotyping for hereditary hemochromatosis (C282Y and H63D mutations). 2, 1
If TSAT < 45%: The elevated ferritin most likely reflects inflammation, liver disease, metabolic syndrome, or malignancy rather than iron overload. 2, 1
Clinical Context Matters
In the general population, elevated ferritin is more commonly caused by non-iron conditions than by hereditary iron overload. 1 The American Association for the Study of Liver Diseases guidelines emphasize that ferritin can be elevated in necroinflammatory liver disease (alcoholic liver disease, chronic hepatitis B and C, nonalcoholic fatty liver disease), lymphomas, and chronic inflammatory conditions. 2
Key thresholds for hemochromatosis screening: 2
- Men: Ferritin >250-300 μg/L suggests possible hemochromatosis
- Women: Ferritin >200 μg/L suggests possible hemochromatosis
- Your level of 268 ng/mL falls in the borderline range, making TSAT measurement critical
If TSAT ≥ 45%: Proceed with Genetic Testing
Order HFE mutation analysis for C282Y and H63D mutations. 2, 1
If C282Y Homozygous:
- No liver biopsy needed if you have normal transaminases (ALT/AST) and ferritin <1000 μg/L—proceed directly to therapeutic phlebotomy. 2, 1
- Liver biopsy or MRI required if ferritin >1000 μg/L or elevated liver enzymes, as this predicts cirrhosis risk. 2, 1
If Compound Heterozygote (C282Y/H63D) or Other Genotype:
If TSAT < 45%: Evaluate for Secondary Causes
Do not initiate phlebotomy or iron chelation. 1 Instead, investigate:
- Inflammatory conditions: Check CRP, ESR to assess for chronic inflammation. 3
- Liver disease: Evaluate for NAFLD, alcoholic liver disease, chronic hepatitis. 2
- Metabolic syndrome: Assess for diabetes, obesity, dyslipidemia. 2
- Malignancy: Consider age-appropriate cancer screening if clinically indicated. 2
In inflammatory bowel disease specifically, ferritin >100 μg/L with TSAT <16% indicates anemia of chronic disease rather than iron overload. 3
Treatment Implications if Iron Overload Confirmed
Therapeutic phlebotomy protocol: 2, 1
- Induction phase: Weekly phlebotomy of ~500 mL until ferritin drops to 50-100 μg/L
- Maintenance phase: Periodic phlebotomy to maintain ferritin 50-100 μg/L
- Check hemoglobin/hematocrit before each session; avoid >20% drop from baseline
- Recheck ferritin every 10-12 phlebotomies
- Avoid vitamin C supplements as they accelerate iron mobilization and increase oxidative stress
Critical Pitfalls to Avoid
Never diagnose iron overload based on ferritin alone without measuring TSAT. 1 Ferritin is an acute phase reactant and rises with inflammation independent of iron stores. 2, 3
Never start phlebotomy without confirming true iron overload through elevated TSAT and/or genetic confirmation. 1 Inappropriate phlebotomy in inflammatory conditions can worsen anemia.
In patients with ferritin >1000 μg/L, elevated transaminases, and platelet count <200,000/μL, there is approximately 80% probability of cirrhosis—these patients require liver assessment before treatment. 2
Monitoring Strategy
If TSAT is normal and secondary causes are identified, treat the underlying condition and monitor ferritin and TSAT periodically rather than pursuing iron-directed therapy. 1 The ferritin should normalize as the inflammatory or metabolic condition improves.