Differentiated PEL may express Glycophorin and hemoglobin A, absence of myeloperoxidase (MPO) and other myeloid markers [1], Blasts are negative for HLA-Dr, CD34, positive for CD117[1]
+
Immature forms can be negative for Glycophorin or weekly expressed. Positive for Carbonic anhydrase 1, Gero antobody against the Gerbich blood group or CD36 especially at earlier stages of differentiation. CD41 and CD61 are negative [1, 12].