A bone marrow aspiration performed on a 65-year-old female i…
A bone marrow aspiration performed on a 65-year-old female is 70% cellular with a 1.5:1 myeloid to erythroid ratio and 4% blasts. There are megaloblastoid changes in the erythrocytic precursors. Granulocyte precursors show hypogranularity and increased karyorrhexis. Vitamin B12 (cobalamin) and folic acid levels are within reference range. Which of the following findings correlates with the suspected diagnosis?