We have just seen a case that is suspected of being AML but is positive for CD13 only. It is negative for all other markers including CD45. This patient has presented with bilateral renal masses and a deep iliac mass. A random bone marrow showed a diffuse infiltrate of blast cells believed to be myeloid but only CD13 positive. Has anyone else seen any AMLs that are only positive for CD13? Thanks for the help. Haywood Pyle pyle@kfshrc.edu.sa
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