Y chromosome loss detected by FISH in bladder cancer

Cancer Genet Cytogenet. 1995 Jul 15;82(2):163-9. doi: 10.1016/0165-4608(95)00030-s.


To examine the significance of Y chromosome losses in bladder cancer, fluorescence in situ hybridization (FISH) was used to determine its prevalence and associations with known parameters of malignancy. Cells were dissociated from formalin-fixed paraffin-embedded bladder tumors from 68 male patients and from 11 post-mortem bladder washes of male patients with a negative bladder cancer history, and were examined by FISH using centromeric probes for chromosomes X, Y, 7, 9, and 17. Nullisomy for chromosome Y was seen in 23 of 68 tumors (34%), monosomy in 28 of 68 tumors (41%), and polysomy in 17 of 68 tumors (25%). There was no association between chromosome Y loss and tumor grade, stage, tumor growth fraction (Ki67 LI), p53 immunostaining, and presence of p53 deletions. Patient age was higher for tumors with a Y loss (73.5 +/- 12.0 years) than for tumors without Y loss (66.6 +/- 10.8 years; p = 0.0207). In one normal bladder wash, a distinct subpopulation (38% of cells) with Y nullisomy was seen. These data suggest that Y loss is a frequent event that can occur early in bladder cancer, although there is no evidence for a role of Y loss in tumor progression.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Age Factors
  • Aged
  • DNA Probes
  • Gene Deletion*
  • Genes, p53
  • Humans
  • Immunohistochemistry
  • In Situ Hybridization, Fluorescence
  • Male
  • Middle Aged
  • Phenotype
  • Urinary Bladder Neoplasms / genetics*
  • Urinary Bladder Neoplasms / pathology
  • Y Chromosome*


  • DNA Probes