Fig. 1

Morphological characteristics of HXEX-ALL1 cells. Wright-Giemsa staining of primary leukemia cells in the BM of the patient. a At diagnosis (×1000 magnification) and b at second relapse (×1000 magnification). c Wright-Giemsa staining of HXEX-ALL1 cells (×1000 magnification). d Ultrastructural appearance of HXEX-ALL1 cells (×8000 magnification)