A patient with anemia is found to have a low level of serum ferritin and a high level of serum transferrin saturation. What is the most likely cause of this patient's anemia?

A Iron deficiency anemia
B Anemia of chronic disease
C Sideroblastic anemia ✓
D Hemolytic anemia

Explanation

Sideroblastic anemia is characterized by increased iron storage in the mitochondria of red blood cell precursors, leading to a high level of serum transferrin saturation and a low level of serum ferritin.

Source

Wintrobe's Clinical Hematology
Hematology Hematology: Anemia Hematology: Anemia Hard MEDICAL Confidence: medium