Abstract
We present three novel cases of tracheobronchial foreign bodies (TFBs) in children caused by pen caps. One was removed by the rigid bronchoscopy successfully, the second was removed by rigid bronchoscopy combined with tracheotomy, and the last one was treated by bronchotomy from an external thoracic approach. Rigid bronchoscopy is the most widely used for treating TFBs in clinics, especially treating large and special foreign bodies, because rigid bronchoscopy can provide a good view for observation and operation. Successful removal of a foreign body under rigid bronchoscopy (an experienced doctor, suitable instruments, etc.) can obviate tracheotomy/tracheostomy or thoracotomy/bronchotomy.