Here, we identified a novel RARA fusion transcript, BCOR-RARA, in a t(X;17)(p11;q12) variant of APL with unique morphologic features, including rectangular and round cytoplasmic inclusion bodies.     ///    (3) retinoid X receptor alpha is necessary for BCOR-RARA to associate with the RARA responsive element.     ///    BCOR-RARA was found to possess common features with other RARA fusion proteins. 