An adult patient has a white blood count of 80 x 109/L. The differential has 92% Sudan black B–positive blasts and 8% lymphocytes
Which of the following is most likely?
a. Acute myeloid leukemia, minimally differentiated
b. Acute myeloid leukemia without maturation
c. Immature B-cell acute lymphoblastic leukemia
d. Acute megakaryocytic leukemia
ANS: B
Positive staining with either or both the Sudan black B and peroxidase stain characterize acute myeloid leukemia without maturation.
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A mnemonic for remembering the steps for determining the present illness is:
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