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Comparison between image and flow cytometry. A priori factors that influence technique
R Bowman1, Z A Kanacki, C Garberoglio
1Department of Clinical Laboratory Science/Cytology, Loma Linda University School of Allied Health Professions, California, USA.
Analytical and Quantitative Cytology and Histology
|August 1, 1995
Summary
Flow cytometry (FCM) and image cytometry (ICM) show high concordance for pancreatic tissue DNA ploidy analysis. Tumor/nontumor ratios can guide the selection of FCM or ICM, improving diagnostic accuracy.
Area of Science:
- Oncology
- Pathology
- Biotechnology
Background:
- Flow cytometry (FCM) and image cytometry (ICM) are used for DNA ploidy analysis in pancreatic tissue.
- Previous studies show high concordance but also discrepancies between FCM and ICM.
Purpose of the Study:
- To determine the concordance rate between FCM and ICM in pancreatic tissue.
- To identify reasons for discrepancies and establish methods for selecting the appropriate procedure.
- To assess the utility of tumor/nontumor ratios in guiding procedure selection.
Main Methods:
- Compared FCM and ICM on 40 pancreatic tissue cases (chronic pancreatitis, adenocarcinoma).
- Used FACSCAN flow cytometer and CAS 200 for DNA content analysis.
- Applied factor analysis to evaluate discrepant cases and identify sources of variation.
Main Results:
- Achieved a concordance rate of r = .878 (P < .01) after outlier removal.
- 31 of 40 cases matched DNA content; 9 cases showed discrepancies.
- Factor analysis revealed that tumor/nontumor ratios explained a significant portion of the variation between methods.
Conclusions:
- FCM and ICM demonstrate high concordance in pancreatic tissue DNA ploidy analysis.
- Tumor/nontumor cell ratios in H&E-stained sections can guide the a priori selection of FCM or ICM.
- This approach can optimize diagnostic accuracy for pancreatic tissue analysis.