This slide shows peripheral blood from a patient with CLL. A striking increase in the number of relatively normal-appearing lymphocytes is apparent. In contrast to ALL, which requires the presence of increased numbers of blasts in the bone marrow and peripheral blood for diagnosis, CLL is characterized by a marked increase in the number of relatively mature lymphocytes, sometimes only in either the peripheral blood or the bone marrow.
Course Section: 07. Lymphocytic Leukemia: Acute and Chronic
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