<prompt> Most specific marker for myeloid series is:CD34CD45CD99CD117  <response>: As per Wintrobes the marker for myeloud series CD13,CD33,CD11b,CD15,CD117 and cMPO. Regarding other options CD 34 -myeloid and lymphoid blasts,stem cells CD45 -leucocyte common antigen CD 99- Ewings sarcoma. ref wintrobes 11th 4145 