35,000 mm3; prothrombin time-20 sec with a control of 13 sec; paial thromboplastin time-50sec; and Fibrinogen 10mg/dL. Peripheral smear was suggestive of acute myeloblastic leukemia. Which of the following is the most likely?: (A) Myeloblastic leukemia without maturation, (B) Myeloblastic leukemia with maturation, (C) promyelocytic leukemia, (D) Myelomonocytic leukemia
Answer is A. Acute myeloblastic leukemia without maturation is a quickly progressing disease in which too many immature white blood cells (not lymphocytes) are found in the blood and bone marrow. It is classified as "M1" in the FAB classification.