Usually the gene fusion PML/RARA is located on chromosome 15.     ///    Cryptic translocation of PML/RARA on 17q.     ///    PCR showed a typical PML/RARA rearrangement in exon 1.     ///    "This case adds further information on alternative ways of rearrangement of the PML/RARA genes, possibly correlated with all-trans retinoic acid resistance.. "