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

A It helps to differentiate between iron deficiency anemia and anemia of chronic disease ✓
B It is used to diagnose megaloblastic anemia
C It is a marker for hemolytic anemia
D It is used to diagnose sideroblastic anemia

Explanation

The serum transferrin receptor level is a useful marker to differentiate between iron deficiency anemia and anemia of chronic disease, as it is elevated in iron deficiency anemia but not in anemia of chronic disease.

Source

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