What this pattern supports and cannot establish

The guided case supports an established iron-deficiency pattern more closely than the compared alternatives. It cannot establish a cause of deficiency, diagnose a patient, or make inflammation impossible. Ferritin must be interpreted as both a storage marker and an acute-phase reactant.

WHO hemoglobin cutoffs classify anemia in the appropriate population; apply the relevant sex, pregnancy, altitude, and smoking guidance rather than treating a cutoff as a cause-specific microcytic diagnosis.

Use current assay and population references; the intervals displayed here are representative and must be verified locally. Hemoglobin-analysis families such as high-performance liquid chromatography and capillary electrophoresis are not interchangeable through a universal HbA2 cutoff. Soluble transferrin receptor availability and decision limits also vary by assay.

CLIA verification and control requirements apply to the laboratory method and complete analytic process. No universal reflex algorithm, critical value threshold, or local comment applies here. Update this content when current iron, hemoglobinopathy, lead, WHO, or local validated-method guidance changes.