Fig. 2

A 57-year-old woman with pre-biopsy pneumothorax (patient 7 in the Table 2). The patient underwent a transbronchial lung biopsy a day before, but insufficient tissue was obtained for a pathological diagnosis. a Axial unenhanced CT scan shows a 4.2 cm sized mass (arrowhead) in the left lower lobe superior segment. b Pneumothorax is present in a pre-biopsy CT scan. c Because of movement of the lung, the first needle was malpositioned in the lung parenchyma adjacent to the target (thin arrow). Instead of removing the malpositioned needle, a second attempt was made using another needle, expecting that the first needle could restrain the lung. The second needle successfully reached the target (empty arrow). A histopathological examination of biopsy specimen revealed an adenocarcinoma