Primary objective: * To estimate the degree of agreement in diagnosis of cytologic samples from mediastinal lymph nodes obtained by Endobronchial Ultrasound (EBUS)-guided Fine Needle Capillary Sampling (FNC) versus Fine Needle Aspiration (FNA). Secondary objective: * To compare the quality of cytologic samples from mediastinal lymph nodes obtained by EBUS-guided FNC versus FNA. The quality of the samples will be assessed initially by MDACC on-site cytology technicians, and then corroborated by physicians in the department of cytology. This assessment will be performed utilizing the Mair's score 3. The score consists of a 0-10 scale: 1-2= poor; 3-6=good; 7-10=superior.
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Number of times FNA and FNC agree on patient diagnosis (concordance)
Timeframe: 2 Years