title: Assessment of cytogenetic aberrations and comet assay in colorectal adenocarcinomas.
abstract: AIMS, BACKGROUND AND STUDY DESIGN: Few studies have investigated the karyotypes of colorectal carcinomas with emphasis on the correlation between cytogenetic findings and clinicopathologic features. The aim of our study involving 20 colorectal adenocarcinomas was to determine their genomic alterations at the chromosomal level by correlating the cytogenetic findings with the extent of DNA damage and clinicopathologic parameters and to compare the results with those of healthy controls.
  
  
  RESULTS
  Cytogenetic evaluation of patients and controls revealed 10 abnormal karyotypes in patients with adenocarcinomas located in the rectum, sigmoid and rectosigmoid regions. Four had numerical and six had structural abnormalities.
  
  
  CONCLUSIONS
  Statistical analysis revealed a significant difference compared with controls (P <0.01). The karyotypes and the extent of DNA damage assessed by the comet assay were also significantly correlated with tumor stage (P <0.01) using the Kruskal-Wallis non-parametric test, while no statistical significance was observed in relation to patient age and smoking.
authors.affiliation: Department of Obstetrics and Gynecology-Infertility Center, Ankara University School of Medicine, Turkey. vbaltaci@hotmail.com
authors.forename: Volkan
authors.initials: V
authors.lastname: Baltaci
authors.forename: Semra
authors.initials: S
authors.lastname: Sardas
authors.forename: Bulent
authors.initials: B
authors.lastname: Aytac
authors.forename: Sami
authors.initials: S
authors.lastname: Cakar
authors.forename: Ali Esat
authors.initials: AE
authors.lastname: Karakaya
mesh_terms: D000230:Adenocarcinoma / Q000235:genetics* / Q000473:pathology; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016022:Case-Control Studies; D002465:Cell Movement; D002869:Chromosome Aberrations; D002875:Chromosomes / Q000235:genetics; D015179:Colorectal Neoplasms / Q000235:genetics* / Q000473:pathology; D020552:Comet Assay; D004249:DNA Damage; D005260:Female; D017353:Gene Deletion; D015321:Gene Rearrangement; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D007621:Karyotyping; D008297:Male; D008875:Middle Aged; D014314:Trisomy