The role of lactate dehydrogenase of the pleural liquid in the cytopathological diagnosis

Abstract

Elevated serum or pleural fluid lactate dehydrogenase (LDH)enzyme levels can be associated with various conditions, including neoplasia, reticuloendothelial tumors, and leukemia. These conditions can lead to cell damage or death, causing LDH to be released into the bloodstream and pleural fluid. An increase in LDH levels may prompt further investigation into the underlying cause, which could include malignancies or other diseases. Elevated LDH levels in pleural fluid are often associated with
certain conditions, and our study seeks to establish a quantitative assessment of LDH in conjunction with cytopathological examination for diagnostic purposes. 
We show here that the presence of abnormal or malignant cells in pleural fluid, as indicated by positive cytopathological results, can be concerning and often necessitates further evaluation. Elevated LDH levels provide biochemical evidence that supports the cytopathological findings, strengthening the case for a potential underlying disease or condition.