Fig. 2.
In vitro RA-induced differentiation of pretreatment and relapse APL cells from selected patients determined by the NBT test. (A) Case no. 12; (B) case no. 9; (C) case no. 17; (D) case no. 14. (▪) pretreatment sample; (•) relapse sample. Case no. 12 only: (▴) primary DA refractoriness; (▾) postintravenous liposomal RA.