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Related Experiment Videos

Mosaic unbalanced structural abnormalities confirmed using FISH on buccal mucosal cells.

K S Reddy1, L Mak

  • 1Cytogenetics Laboratory, Quest Diagnostics Inc., CA, San Juan Capistrano, USA. reddyk@questdiagnostics.com

Annales De Genetique
|May 4, 2001
PubMed
Summary

This study confirms rare mosaic unbalanced rearrangements in buccal cells using interphase fluorescence in situ hybridization (FISH). This method accurately detects chromosomal abnormalities in a second tissue, aiding genetic diagnosis.

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Area of Science:

  • Genetics
  • Cytogenetics
  • Molecular Biology

Background:

  • Mosaic unbalanced structural rearrangements are rare chromosomal abnormalities.
  • Detecting mosaicism in a second tissue can be challenging but crucial for accurate diagnosis.

Purpose of the Study:

  • To confirm rare mosaic unbalanced structural rearrangements in buccal mucosal cells.
  • To evaluate the applicability of interphase fluorescence in situ hybridization (FISH) in a secondary tissue.

Main Methods:

  • Peripheral blood samples were analyzed for mosaic unbalanced structural rearrangements.
  • Interphase FISH was performed on buccal mucosal cells using specific probes.
  • Three cases with de novo mosaic rearrangements were analyzed.

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Main Results:

  • Mosaic triplication for 13q22q33 was confirmed in 41% of buccal cells.
  • Additional material on 3q derived from 14q31qter was detected in buccal cells.
  • Mosaic de novo add(5) from 3p26pter was confirmed in 40% of buccal epithelial cells.

Conclusions:

  • Interphase FISH is a valuable tool for confirming mosaic unbalanced rearrangements in buccal mucosal cells.
  • This technique enhances the diagnostic accuracy of rare chromosomal abnormalities.
  • Buccal cells serve as a viable secondary tissue for confirming mosaicism.