MSRA-0900

MSRA-0900

A 65-year-old man visits you to discuss his recent blood tests, which were part of a routine health screening conducted three days ago. He is currently on day five of antibiotics for community-acquired pneumonia, which was treated by one of your colleagues. Apart from this recent infection, he has no medical history and no new symptoms to report. His renal function is normal, and the rest of his blood tests are as follows:
– Hb: 110 g/l
– Platelets: 540 * 109/l
– WBC: 13 * 109/l
– MCV: 76 * 109/l
– Ferritin: 330 * 109/l
All values were normal one year ago. What is the most likely cause of his anemia?