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We described heterozygous deletion of tumor protein 53 (TP53) gene in 11 patients including 2 patients with non-malignant diseases (pneumonia) and 9 patients with malignant diseases [including small cell lung cancer (n = 3), non-small cell lung carcinoma (n = 4), non-Hodgkin%u2019s lymphoma (n=1), and gastric carcinoma (n=1)]. Chromosomal aberrant status was analyzed by fluorescence in situ hybridization with centromere specific and 17p13.1 locus specific probes. In 3 of 9 cancer patients we did not find malignant pleural effusion with histological examination and/or closed pleural biopsy. Heterozygous deletion of TP53 gene was found to be significantly higher in patients with malignant disease when compared to the patients with benign pleural fluid. As a result, we suggest that heterozygous deletion of TP53 may have indicator value for malignancy; however further studies are warranted to confirm this suggestion in large patient cohorts

Evaluation of Heterozygous Deletion of TP53 Gene in Pleural Fluid Samples: A Case Series of 11 Patients