Analysis of normal and leukemic bone marrow by CD45-side scatter analysis. (A) Normal marrow illustrating several normal populations. (B) Lymphoblasts as seen in ALL. (C) Treated CML illustrating transition to acute phase with increased myeloblasts and a reactive increase in erythroid precursors. (D) Low-grade lymphoproliferative disorder illustrated by CLL. These patterns are representative and are not specifically diagnostic in the absence of other data.