GLI1 and acute promyelocytic leukemia: Study of GLI-1 gene expression in relation to patients’ characteristics revealed that no statistically significant difference was demonstrated between GLI-1 gene expression and different age groups, between males and females, or among different FAB subtypes (p = 0.175, 0.645, and 0.271, respectively), also, the expression wasn’t significantly different on comparing APL patients with other FAB subtypes (p = 0.661).