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Effusion cytology.
1Department of Pathology and Cell Biology, Jefferson Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania.
Clinics in Laboratory Medicine
|June 1, 1991
Summary
Cytologic evaluation reliably detects malignancy in body fluids, but negative results may not exclude cancer. Some cancers like mesothelioma and lymphomas are challenging to diagnose definitively via cytology alone.
Area of Science:
- Cytopathology
- Oncology
- Fluid analysis
Background:
- Cytologic evaluation is the primary method for detecting malignancy in body cavity fluids.
- While positive results are highly accurate, negative findings do not definitively rule out cancer.
Purpose of the Study:
- To assess the diagnostic accuracy of cytologic evaluation for various malignancies in body effusions.
- To identify limitations of cytologic methods in diagnosing specific cancers and benign conditions.
Main Methods:
- Review of cytologic findings in body cavity effusions.
- Correlation of cytologic diagnoses with definitive diagnoses where available.
- Analysis of accuracy for specific tumor types and benign effusions.
Main Results:
- Cytology accurately classifies adenocarcinomas, squamous cell carcinomas, small-cell carcinomas, melanomas, large-cell lymphomas, and acute leukemias.
- Definitive diagnosis of malignant mesothelioma, small-cell lymphomas, chronic leukemias, sarcomas, and poorly differentiated neoplasms is often difficult.
- Causes of benign effusions are generally not determinable by cytologic methods.
Conclusions:
- Cytologic evaluation is a valuable tool for detecting malignancy in body fluids, with high reliability for certain cancers.
- Additional diagnostic techniques may be necessary for definitive diagnosis of challenging neoplasms and lymphomas.
- Cytology has limited utility in determining the specific causes of benign effusions.