Pathological analysis of the Bcr-Abl–BMT mice. (a) Peripheral blood smear from a primary Bcr-Abl–BMT mouse with the myeloproliferative disorder (original magnification × 600). The peripheral blood smear was stained with LeukoStat from Fisher. (B through D) Histological sections (original magnification × 400) of the spleen (b), liver (c), and lung (d) from a primary Bcr-Abl–BMT mice with the myeloproliferative disorder. Histological sections were stained with hematoxylin and eosin. Arrows in (c) point out mitotic hematopoietic cells.