AMBIGUOUS LEUKEMIA

AMBIGUOUS LEUKEMIA

3 TYPES:

1) UNDIFFERENTIATED ACUTE LEUKEMIAS:
Lack morphologic or immunologic differentiating features;
Blasts cell express HLA-DR,CD34,CD38,TdT( terminal deoxynucleotidase) and CD7.

2) BILINEAL ACUTE LEUKEMIA:
Two populations of blasts expressing distinct lineage markers of myeloid or lymphoid origin or B- and T-cell lineage

3) BIPHENOTYPIC ACUTE LEUKEMIA:
Same Blast cell coexpress myeloid and lymphoid antigen both ..usually seen in BLAST CRISES OF CHRONIC MYELOID LEUKEMIA