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Interphase cytogenetic studies of bladder cancer
M R Wang1, B Perissel, J Taillandier
1Laboratoire d'histologie-embryologie-cytogénétique, faculté de médecine, Clermont-Ferrand, France.
Bulletin Du Cancer
|December 1, 1994
Summary
Interphase fluorescence in situ hybridization (FISH) identified chromosomal changes in bladder cancer. These genetic alterations, including aneuploidies, are linked to invasive and poorly differentiated tumors, aiding in diagnosis and monitoring.
Area of Science:
- Uro-oncology
- Cytogenetics
- Molecular Pathology
Background:
- Transitional cell carcinomas (TCC) are the most common human urinary bladder cancers.
- Accurate cytogenetic analysis is crucial for understanding bladder cancer progression and patient outcomes.
Purpose of the Study:
- To investigate chromosomal abnormalities in transitional cell carcinomas of the human urinary bladder using interphase fluorescence in situ hybridization (FISH).
- To evaluate the utility of FISH for analyzing various sample types, including isolated nuclei, frozen sections, vesical washings, and archived tissues.
Main Methods:
- Interphase fluorescence in situ hybridization (FISH) was performed on isolated nuclei from 26 bladder tumors.
- FISH analysis was also applied to frozen sections, vesical washings, and paraffin-embedded tissues for retrospective studies.
Main Results:
- Nonrandom chromosomal changes, including gains of chromosome 7 (+7) and losses of chromosomes 9 (-9) and 10 (-10), were identified.
- Monosomy 11, tetraploidies, and polyploidies were observed in invasive and poorly differentiated tumors.
- FISH analysis proved effective on various sample types, including archival material.
Conclusions:
- Interphase FISH is a powerful tool for the cytogenetic study of bladder cancer.
- FISH analysis can aid in the diagnosis, classification, and monitoring of bladder tumor progression.
- Identified chromosomal aberrations correlate with tumor aggressiveness and invasiveness.