Histological analyses of leukemic mice. (A–F) Histological analyses of AML (mouse no. 14). Original magnifications: A–C, ×200; inset in C, ×1,000; D and right side of E, ×250; inset in D, ×650; left side of E, ×400; F, ×400. (G–O) Histological analyses of AML with a dominant mast cell population (mouse no. 16). (G–L) Primary recipient. (M–O) Secondary recipient. Original magnifications: G and M, ×100; H, J, and N, ×200; I, K, and O, ×400; L, ×600. Mast cells with metachromatic granulation in the Giemsa stain are indicated by an arrow. MPO, myeloperoxidase; CAE, N-acetyl-chloroacetate esterase.