The invaluable role of transbronchial needle aspiration (TBNA) in the diagnosis and staging of mediastinal adenopathy and lung cancer has been well established. Different lymph nodes regional nomenclatures and maps had been described over the years. The international association for the study of lung cancer (IASLC) and Wang's maps complement each other benefiting patients with lung cancer. In this article we briefly reviewed the roles of IALSC, Wang's maps and ROSE in TBNA.