Related Experiment Video
Updated: Nov 16, 2025

Cell Block Preparation from Cytology Specimen with Predominance of Individually Scattered Cells
Published on: July 21, 2009
Serous fluid cytopathology: Past, present, and future
1Department of Pathology, University Hospitals Cleveland Medical Center/Case Western Reserve University, Cleveland, Ohio, USA.
Serous fluid analysis aids in diagnosing various diseases using microscopy and molecular tests. The International Reporting System for Serous Fluid Cytopathology (IRSSF) standardizes terminology and criteria for effusion diagnosis.
Area of Science:
- Cytopathology
- Oncology
- Molecular Diagnostics
Background:
- Serous fluids/effusions are crucial cytology samples reflecting diverse pathologies.
- Traditional analyses include microscopy, chemical assays, cell counts, and cultures.
- Emerging role of effusions as liquid biopsies for molecular testing.
Discussion:
- Effusions are increasingly utilized for thoranostic and prognostic marker identification.
- Molecular interrogation aids in selecting targeted therapies for various conditions.
- The International Reporting System for Serous Fluid Cytopathology (IRSSF) establishes standardized reporting.
Key Insights:
- IRSSF provides standardized terminology and well-defined diagnostic criteria for serous fluid analysis.
- The system facilitates consistent and reliable reporting of effusion cytology findings.
- Comprehensive review of effusion work-up progress and IRSSF contributions.
Outlook:
- Future directions in serous fluid analysis and the impact of standardized reporting.
- Integration of molecular profiling into routine effusion diagnostics.
- Advancements in thoranostic applications leveraging effusion-based liquid biopsies.
Related Concept Videos
Cytoplasm
Protein Folding and Misfolding
The cytoplasm is the location for several cellular processes, including protein synthesis and folding. The aqueous nature of the cytosol promotes protein folding such that the hydrophobic amino acid side chains are buried in the protein...
Pleural Effusion I: Introduction
There are two main types of pleural effusion: transudative and exudative. They are differentiated using Light's...
Pleural Effusion II: Symptoms and Management
A pleural effusion is the abnormal collection of fluid between the parietal and visceral pleura layers of tissue that form the lining of the lungs and chest cavity. It can occur independently or due to surrounding parenchymal diseases, such as infection, malignancy, or inflammatory conditions.
Clinical Manifestations:
Inflammatory Response II: Inflammatory Exudate and Tissue Repair
The typical wound exudate is odorless, transparent, straw-colored, thin, and watery. Exudate, however, can differ depending on the state of wound healing. Likewise, the...
Sputum Studies I: Gram Stain, cytology, and Acid-fast smear and culture
Gram Stain
The Gram Stain is an integral part of sputum studies. It involves the staining of sputum, which permits...
Cystic Fibrosis: Pathogenesis
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation,...

