Guidance for fluorescence in situ hybridization testing in hematologic disorders

Area of Science:

• Hematology
• Cytogenetics
• Molecular Biology

Background:

• Fluorescence in situ hybridization (FISH) is vital for evaluating chromosome abnormalities in hematologic malignancies.
• FISH assays often use non-FDA-approved probes, necessitating specific pre- and postanalytical procedures.
• Laboratories require guidance for implementing and validating FISH testing.

Purpose of the Study:

• To provide an overview of technical parameters for reliable FISH results.
• To guide laboratories in adopting procedures for metaphase and interphase FISH testing.
• To offer detailed guidance for laboratory directors on implementing FISH programs.

Main Methods:

• Overview of technical parameters influencing FISH results.
• Details on implementing metaphase and interphase FISH testing.
• Guidance on technologist training, probe types, and result interpretation.

Main Results:

• Specific procedures and policies for reliable FISH testing are encouraged.
• A rigorous technologist training program and interpretation guidance are detailed.
• Information on common probes, nomenclature, and FISH's role in disease monitoring is provided.

Conclusions:

• Implementing robust FISH testing programs requires attention to technical parameters and standardized procedures.
• Proper training and interpretation are essential for accurate diagnosis and patient care in hematologic malignancies.
• This guidance assists laboratories in optimizing FISH testing practices within regulatory frameworks.