Clinical Laboratory Hematology 3rd Edition by Shirlyn McKenzie, Lynne Williams

Exercise 5

A 3-year-old patient presents with severe normocytic, normochromic anemia. Platelet counts and leukocyte counts are normal. The mother reported that the child has been healthy since birth but recently had a cold. Which of the following laboratory test results would support a diagosis of TEC? (Objectives 1, 5, 6)
A) decreased numbers of erythrocyte precursors on bone marrow examination
B) normal hemoglobin F level on hemoglobin electrophoresis
C) abnormal karyotype
D) i antigen on the patient's erythrocytes