Abstract
Purpose
Systemic and local inflammations have been described as relevant prognostic factors in patients with cancer. However, parameters that stand for immune activity in the pleural space have not been tested as predictors of survival in patients with malignant pleural effusion. The objective of this study was to evaluate pleural lymphocytes and Adenosine Deaminase (ADA) as predictors of survival in patients with recurrent malignant pleural effusion.
Methods
Retrospective cohort study includes patients who underwent pleurodesis for malignant pleural effusion in a tertiary center. Pleural fluid protein concentration, lactate dehydrogenase, glucose, oncotic cytology, cell count, and ADA were collected before pleurodesis and analyzed. Survival analysis was performed considering pleurodesis as time origin, and death as the event. Backwards stepwise Cox regression was used to find predictors of survival.
Results
156 patients (out of 196 potentially eligible) were included in this study. Most were female (72 %) and breast cancer was the most common underlying malignancy (53 %). Pleural fluid ADA level was stratified as low (<15 U/L), normal (15 ≤ ADA < 40), and high (≥40). Low and high ADA levels were associated with worse survival when compared to normal ADA (logrank: 0.0024). In multivariable analysis, abnormal ADA (<15 or ADA ≥ 40) and underlying malignancies different from lymphoma, lung, or breast cancer were associated with worse survival. Pleural fluid cell count and lymphocytes number and percentage did not correlate with survival.
Conclusions
Pleural fluid Adenosine Deaminase levels (<15 or ≥40 U/L) and neoplasms other than lung, breast, or lymphoma are independent predictors of worse survival in patients with malignant pleural effusion who undergo pleurodesis.
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Acknowledgments
Ricardo M. Terra: Study design, data analysis, manuscript writing, and revision; Leila Antonagelo: Study design, data analysis, manuscript writing; Alessandro W. Mariani: Data collection and analysis, manuscript writing; Ricardo Lopes Moraes de Oliveira: Data collection and analysis, manuscript writing; Lisete R. Teixeira: Study design, data analysis, manuscript revision; Paulo M. Pego-Fernandes: Study design, manuscript revision.
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Terra, R.M., Antonangelo, L., Mariani, A.W. et al. Pleural Fluid Adenosine Deaminase (ADA) Predicts Survival in Patients with Malignant Pleural Effusion. Lung 194, 681–686 (2016). https://doi.org/10.1007/s00408-016-9891-2
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DOI: https://doi.org/10.1007/s00408-016-9891-2