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Some difficult choices in cytogenetics.

John Swansbury1

  • 1Academic Haematology and Cytogenetics, The Royal Marsden NHS Trust, The Institute of Cancer Research, Surrey, UK.

Methods in Molecular Biology (Clifton, N.J.)
|May 15, 2003
PubMed
Summary

Conventional cytogenetics and fluorescence in situ hybridization (FISH) are foundational for routine malignancy cytogenetics services. Molecular methods like RT-PCR require further validation for clinical use.

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Area of Science:

  • Cytogenetics
  • Molecular Diagnostics
  • Cancer Research

Background:

  • Cytogenetic analysis is crucial for diagnosing and managing malignancies.
  • Various molecular and cytogenetic technologies are available for cancer diagnostics.
  • Selecting appropriate techniques for routine service is challenging.

Purpose of the Study:

  • To evaluate the current value of different cytogenetic and molecular assays for routine malignancy diagnosis.
  • To provide expert opinion on the utility of various techniques based on laboratory experience.

Main Methods:

  • Review of conventional cytogenetics, fluorescence in situ hybridization (FISH), multiplex FISH (MFISH), spectral karyotyping (SKY), comparative genomic hybridization (CGH), fiber FISH, and reverse transcription polymerase chain reaction (RT-PCR).
  • Expert opinion based on practical application in a diagnostic laboratory setting.

Main Results:

  • Conventional cytogenetics with automated karyotyping remains the cornerstone of routine malignancy services.
  • Fluorescence in situ hybridization (FISH) using chromosome paints and gene-specific probes is a valuable addition.
  • Multiplex FISH (MFISH) and Spectral Karyotyping (SKY) offer advanced capabilities but are costly.
  • Comparative Genomic Hybridization (CGH) and fiber FISH are primarily research tools.
  • Molecular methods like RT-PCR currently require additional confirmation for clinical management.

Conclusions:

  • A combination of conventional cytogenetics and FISH provides a powerful routine malignancy diagnostic service.
  • Advanced techniques like MFISH/SKY are useful but expensive.
  • CGH, fiber FISH, and RT-PCR have limited current applications in routine diagnostics, requiring further validation.

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