Optimal Volume Assessment for Serous Fluid Cytology

Area of Science:

• Cytopathology
• Oncology
• Fluid analysis

Background:

• Accurate diagnosis of serous effusions is crucial for patient management.
• The International System for Reporting Serous Fluid Cytopathology (TIS) provides a standardized classification.
• Understanding factors influencing diagnostic categories, such as fluid volume, is important.

Purpose of the Study:

• To determine the optimal serous fluid volume for accurate diagnosis using TIS.
• To analyze the distribution of serous effusion cases across TIS categories.
• To correlate fluid volume with TIS categories and epidemiological data.

Main Methods:

• Retrospective analysis of 2340 serous effusion cases (pleural, peritoneal, pericardial).
• Assignment of TIS categories (ND, NFM, AUS, SFM, MAL) to each case.
• Correlation of fluid volume with TIS categories in 1181 cases.

Main Results:

• Statistically significant differences in fluid volume distributions were found between certain TIS categories.
• Lower volumes were observed in Negative for Malignancy (NFM) compared to Malignant (MAL) cases.
• Differences in volume were not clinically significant for diagnostic accuracy.

Conclusions:

• Fluid volume has a minimal influence on TIS category assignment.
• Fluid volume does not impact the diagnostic accuracy of serous effusion cytology.
• Ideal serous effusion specimen volume should be based on practical considerations.