A 54-year-old man presented with a nodular lesion on the left neck at the site of a previous arterial line placement. It was originally considered a keloid. Upon consultation, the dermatologist suspected malignancy and a skin biopsy was performed (Figs. 22.1 and 22.2). Because of the histologic pattern, peripheral blood was studied and showed a total leukocyte count of 11,600/μl with 69% neutrophils, 10% lymphocytes and 19% monocytes including about 5% immature forms. His hemoglobin was 11.9 g/dl, hematocrit 36.9% and platelets 270,000/μl. This raised the suspicion of leukemia and a bone marrow biopsy was performed (Figs. 22.3 and 22.4).
KeywordsAcute Myeloid Leukemia Acute Leukemia Bone Marrow Biopsy Total Leukocyte Count Monocytic Leukemia
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