“…The percutaneous transthoracic FNAC and/or biopsy of the mediastinal lesion under local anesthesia are minimally invasive, cost-effective, easy to perform, and associated with reduced complication rates when performed under ultrasound or CT scan guidance [13]. The accuracy of transthoracic biopsy in the diagnosis of mediastinal lesions ranges from 75% to 90% [14,15,16] The diagnostic accuracy of mediastinal lesions approached in the present study was 89.9% that is similar to the diagnostic yield in studies by Shaheen et al [17] and Güllüoglu et al, [18] superior compare to studies by Morrissey et al [19] (77%), Assaad et al [20] (82%), Rosenberger and Adler [21] (83%), Adler et al [22] (79%), Pedersen et al [23] (81%), Dubashi et al [24] (50%), and Neyaz et al [25] (74%) and inferior to the studies by Nasit et al [26] (97%) and Annessi et al [6] (100%).…”