inasmuch as sudan black b stain is highly specific for myeloid cells and since over 3 % positive blast cells meet the needs of diagnosis for myeloblastic leukaemias , we had the opportunity to study a 27 year-old male with acute leukaemia whose morphological , cytochemical , immunocytochemical ( hla-dr , cd-10 , cd-19 , cd-20 , cd-21 all positive ) and ultrastructural features were clearly in accordance with acute lymphoblastic leukaemia , except for 42 % sudan black b positivity of the bone marrow blast cells .
C0887899
myeloid cells
C0023449
acute lymphoblastic leukaemia