Mediastinal lymphadenopathy predominates in the anterior mediastinum and the paratracheal regions. When lymphadenopathy involves the hilar regions, it is usually asymmetric. Primary tuberculosis ...

Although not common, paratracheal, subcarinal, aortopulmonary window, and other mediastinal lymph node groups can be involved in the absence of hilar lymphadenopathy. The radiographic appearance ...