Pericardial fluid surrounds the heart within the pericardial sac.
Cytological examination helps identify the cause of pericardial effusion.
Clinical uses include:
Detecting malignant cells (e.g., metastatic carcinoma, lymphoma).
Identifying infectious causes (bacterial, viral, or tuberculosis).
Assessing inflammatory or autoimmune conditions.
Differentiating between benign and malignant effusions.
Often performed alongside biochemical, microbiological, and histopathological tests for a complete evaluation