In the other with an unbalanced der(5)t(5;17)(q13;q21) and a nucleolar NPM localization pattern, an NPM/RAR alpha rearrangement was excluded, and FISH revealed deletion of one RAR alpha allele.     ///    "Two patients were found to have t(5;17), one with a diffuse nuclear NPM staining pattern and with NPM-RAR alpha and RAR alpha-NPM transcripts detected. "