Molecular characterization of der(15)t(11;15) as a secondary cytogenetic abnormality in acute promyelocytic leukemia with cryptic PML-RAR alpha fusion on 17q

Cancer Genet Cytogenet. 2000 Aug;121(1):90-3. doi: 10.1016/s0165-4608(00)00234-x.


A case of acute promyelocytic leukemia (APL) with cryptic PML-RAR alpha fusion on 17q and add(15p) as a secondary abnormality was characterized using molecular cytogenetic techniques. Spectral karyotyping (SKY) showed that chromosome 11 material was added to 15p, forming a der(15)t(11;15), which was refined to der(15)t(11;15)(q13.2;p13) with information obtained by comparative genomic hybridization (CGH). Interstitial insertion of chromosome 15 material into chromosome 17q was found by fluorescence in situ hybridization (FISH) with whole chromosome painting (WCP) probes. This study illustrates the necessity of a combination of molecular cytogenetics to decipher complex karyotypic abnormalities and cryptic translocations in leukemia.

Publication types

  • Case Reports

MeSH terms

  • Chromosomes, Human, Pair 11 / genetics
  • Chromosomes, Human, Pair 15 / genetics
  • Chromosomes, Human, Pair 17 / genetics
  • Humans
  • In Situ Hybridization, Fluorescence
  • Karyotyping
  • Leukemia, Promyelocytic, Acute / genetics*
  • Male
  • Middle Aged
  • Neoplasm Proteins / genetics*
  • Nucleic Acid Hybridization
  • Oncogene Proteins, Fusion / genetics*
  • Translocation, Genetic / genetics*


  • Neoplasm Proteins
  • Oncogene Proteins, Fusion
  • promyelocytic leukemia-retinoic acid receptor alpha fusion oncoprotein