hilar lymphadenopathy causeshilar mass lung cancerunilateral hilar lymphadenopathymediastinal hilar lymphadenopathybilateral hilar lymphadenopathy causesleft hilar adenopathyhilar lymphadenitishilar lymphnodesunilateral hilar adenopathyipsilateral hilar adenopathymediastinal and hilar adenopathybilateral hilar adenopathy