A 32-year-old woman comes to the physician for a routine health maintenance examination. MCV is 72 fL. Serum iron and ferritin are within reference range. Which of the following is most likely to be seen in this patient?
A) Decreased HbF
B) Decreased porphobilinogen deaminase
C) Helmet cells
D) Increased HbA2
E) Pappenheimer bodies
