A 36-year-old woman sought medical advice because of a cough accompanied by wheezing with a 2-month duration. An enhanced computed tomography scan performed at the time of hospitalization revealed a mass (75 x 38 x 35 mm in size) in the left lung that extended to the middle mediastinum; metastatic lesions in the liver, breast, bones, and lymph nodes were also detected. A transbronchial biopsy (TBB) of the lung tumor and an endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) of a lower mediastinal lymph node with lung tumor involvement were performed.