sternoclavicular
adjective medical specialized uk/ˌstɜːn.əʊ.kləˈvɪk.jə.lər/ us/ˌstɝː.noʊ.kləˈvɪk.jə.lɚ/
胸锁的
relating to or joining the sternum (= the main bone in the centre of the chest) and the collarbone that goes from the top of the arms to the bottom of the neck