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Microsatellite DNA Genotyping and Flow Cytometry Ploidy Analyses of Formalin-fixed Paraffin-embedded Hydatidiform Molar Tissues
Published on: October 20, 2019
Microsatellite DNA analysis does not distinguish malignant from benign pleural effusions
F Economidou1, E G Tzortzaki, S Schiza
1Department of Thoracic Medicine, University Hospital, Medical School, University of Crete, Heraklion 71110, Greece.
Oncology Reports
|November 6, 2007
Summary
Molecular markers like microsatellite instability (MSI) and loss of heterozygosity (LOH) were evaluated for diagnosing malignant pleural effusions. The study found these genetic alterations were not effective in distinguishing malignant from benign effusions.
Area of Science:
- Oncology
- Genetics
- Diagnostic Medicine
Background:
- Distinguishing malignant from benign pleural effusions is a diagnostic challenge.
- Routine cytology has limitations in accurately diagnosing malignant pleural effusions.
- Genetic alterations, including microsatellite instability (MSI) and loss of heterozygosity (LOH), are potential biomarkers.
Purpose of the Study:
- To evaluate a panel of molecular markers for detecting genetic alterations in pleural effusion cells.
- To determine the diagnostic value of these markers as an adjunct to cytologic examination.
- To assess the utility of MSI and LOH in differentiating malignant from benign pleural effusions.
Main Methods:
- Analysis of pleural fluid and peripheral blood from 48 patients (26 malignant, 22 benign effusions).
- DNA extraction and microsatellite analysis using markers for MSI and/or LOH.
- Comparison of molecular findings with cytologic results.
Main Results:
- Cytology was positive for malignancy in only 54% of malignant pleural effusions.
- Genetic alterations (MSI/LOH) were detected in 7.6% of malignant pleural effusions.
- A benign pleural effusion case also showed LOH, indicating limited specificity.
Conclusions:
- Microsatellite DNA analysis detected genetic alterations in very few malignant pleural effusion cases.
- The presence of LOH in a benign case further limited its diagnostic utility.
- Microsatellite DNA analysis does not currently facilitate the diagnosis of malignant pleural effusion.
