Construction of evolutionary tree models for nasopharyngeal carcinoma using comparative genomic hybridization data

Cancer Genet Cytogenet. 2006 Jul 15;168(2):105-8. doi: 10.1016/j.cancergencyto.2006.02.017.


Nasopharyngeal carcinoma (NPC) is a malignancy associated with remarkable racial and geographic factors. The development and progression of NPC may involve the accumulation of multiple genetic alterations over a long time. For understanding the putative order of genetic alteration in NPC tumorigenesis, we used evolutionary tree models (branching and distance-based tree models) to analyze comparative genomic hybridization (CGH) data of previously published NPC cases (n = 103). Consistent loss of 3p for both tree models was an important early event in NPC progression. Chromosome 12 gain was another important early event, and may represent a subclass different from 3p- derived subclasses of NPC. The tree models also suggested that at least two subclasses of 3p- derived NPC, one marked by 1q+, 9p-, and 13q- and the other marked by 14q-, 16q-, 9q-, and 1p-.

Publication types

  • Comparative Study

MeSH terms

  • DNA, Neoplasm / genetics*
  • Evolution, Molecular*
  • Humans
  • Models, Genetic*
  • Nasopharyngeal Neoplasms / genetics*
  • Nasopharyngeal Neoplasms / pathology
  • Neoplasm Staging / classification
  • Nucleic Acid Hybridization
  • World Health Organization


  • DNA, Neoplasm