Guidelines for clinician who has prior knowledge of patient history and abnormal labs:
- Hemolytic anemia, especially if accompanied by thrombocytopenia
- Anemia unresponsive to therapy; unexplained anemia
- Leukocyte/bone marrow disorder − pancytopenia, unexplained leukocytosis or leukopenia; leukemia
- Congenital disorders
Clinician suspects from patient history or previous abnormal labs:
- Thrombotic thrombocytopenia purpura (TTP)
- Hemolytic uremic syndrome (HUS) or other unspecified hemolytic anemia
- Leukocyte/bone marrow disorder − pancytopenia, unexplained leukocytosis or leukopenia; leukemia
- Congenital disorders
Determine qualitative and quantitative variations in white cell numbers and morphology, morphology of red cells and platelet evaluation; evaluate anemia, leukemia, and other conditions.