“…The foreign body may reach its site by a transbronchus, transthoracic, or transdiaphragm route. I conducted an Internet search for “the intrathoracic foreign body, foreign body in lung” for the years 1993–2015 with a Japanese medical central magazine and found 15 cases of intrathoracic foreign body without the patient's awareness in Japan ( Table 1 ) [1] , [2] , [3] , [4] , [5] , [6] , [7] , [8] , [9] , [10] , [11] , [12] , [13] , [14] . These cases typically involved adults.…”