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Review Question - QID 109880

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QID 109880 (Type "109880" in App Search)
A 62-year-old man presents to his primary care physician because he is unhappy about his inability to tan this summer. He has been going to the beach with his family and friends, but he has remained pale. He has no other complaints except that he has been getting tired more easily, which he attributes to normal aging. Based on clinical suspicion a panel of tests are performed with the following results:

Hemoglobin: 11 g/dL
Leukocyte count: 5,370/mm^3
Platelet count: 168,000/mm^3
Mean corpuscular volume: 95 µm^3
Haptoglobin level: Decreased
Reticulocytes: 3%

Peripheral blood smear is also obtained and shown in the figure provided. Which of the following patient characteristics is consistent with the most likely cause of this patient's disease?
  • A
  • A