A Trial of EBUS-TBNA Versus Conventional TBNA in Diagnosis of Sarcoidosis

The investigators hypothesize that conventional or EBUS-TBNA will have equal efficiency in diagnosing sarcoidosis when performed in conjunction with endobronchial and transbronchial lung biopsy.

Diagnostic procedures like transbronchial lung biopsy (TBLB), transbronchial needle aspiration (TBNA) and endobronchial biopsy (EBB) are routinely used to obtain pathological confirmation of pulmonary sarcoidosis. Real-time convex probe endobronchial ultrasound-guided TBNA (EBUS-TBNA) has shown immense potential, however it is costly, labor intensive and still has limited availability, especially in low and middle income countries. In the past, TBLB has been the bronchoscopic procedure of choice for diagnosis of sarcoidosis however currently its role is being debated with the advent of EBUS. We have observed that EBUS even though has high yield yet the optimal diagnosis is obtained only when combined with EBB and TBLB. The investigators hypothesize that conventional or EBUS-TBNA will have equal efficiency in diagnosing sarcoidosis when performed in conjunction with endobronchial and transbronchial lung biopsy.

The study compares the diagnostic yield of EBUS-TBNA (plus EBB and TBLB) vs. conventional TBNA (plus EBB and TBLB) for diagnosis of sarcoidosis.

Inclusion Criteria:

Consecutive patients presenting with clinicoradiological features suggestive of sarcoidosis and an indication for transbronchial needle aspiration

Exclusion Criteria:

• Pregnancy
• Hypoxemia (SpO2 <90%) on room air
• Poor lung function (forced expiratory volume in first second [FEV1] <1L)
• Patients with deranged clotting profile (prothrombin time >3 seconds above control; activated partial thromboplastin time >10 seconds above control, platelet count <50000/µL)
• Patients already initiated on glucocorticoids
• Diagnosis of sarcoidosis possible on minimally invasive techniques such as skin biopsy or peripheral lymph node biopsy and failure to provide informed consent