What is the significance of serum transferrin receptor levels in the diagnosis of iron deficiency anemia?

A It helps in differentiating between iron deficiency anemia and anemia of chronic disease ✓
B It is used to diagnose megaloblastic anemia
C It is a marker for vitamin B12 deficiency
D It is used to diagnose sickle cell anemia

Explanation

Serum transferrin receptor levels are elevated in iron deficiency anemia and can help differentiate it from anemia of chronic disease

Source

Harrison's Principles of Internal Medicine
Hematology Hematology: Anemia Hematology: Anemia Medium MEDICAL Confidence: high