Review Question - QID 210660

A 20-year-old immigrant man from Turkey presents to the community health center for a new patient visit. The patient reports chronic fatigue but states that he otherwise feels well. His past medical history is not clear, but he does state that he has been hospitalized in the past in his home country for some "problem with his blood". He is not currently taking any medications. The patient admits to drinking 7 alcoholic beverages per day and smoking 1 pack of cigarettes per day. His temperature is 99.4°F (37.4°C), blood pressure is 157/98 mmHg, pulse is 99/min, respirations are 18/min, and oxygen saturation is 100% on room air. Physical exam demonstrates mild pallor but is otherwise unremarkable. Laboratory studies are ordered as seen below.

Hemoglobin: 7.0 g/dL
Hematocrit: 33%
Leukocyte count: 6,500/mm^3 with normal differential
Platelet count: 190,000/mm^3
Mean corpuscular volume (MCV): 60 femtoliters
Free iron: 272 mcg/dL
Total iron binding capacity (TIBC): 175 mcg/dL
Ferritin: 526 ng/mL
Reticulocyte count: 2.8%

Which of the following is the most likely diagnosis?