Utility of residual AutoCyte cervical cytology samples for image analysis

Area of Science:

• Cytopathology
• Molecular Diagnostics
• Gynecologic Oncology

Background:

• Cervical cytology samples are crucial for detecting precancerous and cancerous lesions.
• Liquid-based cytology (LBC) has become a standard for sample collection.
• The utility of residual LBC samples for ancillary studies, like DNA profiling, requires investigation.

Purpose of the Study:

• To evaluate the effectiveness of residual liquid-preserved cervical cytology samples for DNA profiling.
• To assess the stability and reproducibility of results from residual samples.
• To determine the diagnostic performance of the AutoCyte SCREEN system on residual samples.

Main Methods:

• Ninety-nine residual liquid-preserved cervical cytology samples from high-risk individuals were analyzed.
• Samples were processed for Papanicolaou staining and DNA profiling using an RPW image analyzer.
• Manual review and AutoCyte SCREEN system analysis were performed, with results compared to initial diagnoses.

Main Results:

• Good interlaboratory agreement (kappa = .609) was observed between residual and initial samples.
• Abnormalities showed characteristic DNA content deviations (2C index > 2.0, 5C rate > 4.37%).
• The AutoCyte SCREEN system achieved 100% sensitivity and 40% specificity for high-grade abnormalities in residual samples.

Conclusions:

• Residual AutoCyte cervical cytology samples are stable and suitable for routine and ancillary studies.
• Reproducible results can be obtained from residual samples for cytologic abnormalities.
• The AutoCyte SCREEN system shows high sensitivity for high-grade cervical abnormalities using residual material.