Molecular biomarkers are becoming increasingly significant in the workup of lung carcinoma patients. They assist in diagnosis, selecting the most adequate therapy and determining prognosis. Obtaining blood based biomarkers or volatile markers in exhaled breath may provide a less invasive method in the future. For the time being, bronchoscopy is still the method of choice to obtain specimen and assess tissue based biomarkers. The techniques how specimen are collected and processed for analysis are of paramount importance.
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