Statistical Analysis - Descriptive statistics such as mean, median, standard deviation and range will be calculated for all continuous variables. Frequency distributions will be calculated for all qualitative data. Frequency data across categorical variables will be compared using chi-square and fisher's exact test. Among patients with adequate sample on EBUS-TBNA/EUS-B-FNA, sensitivity, specificity, accuracy, and positive and negative predictive values will be calculated using standard formulas. P-value of P<0.05 is considered as statistically significant.