Fig. 1.

Temporal changes of chest CT findings.

(A-C): The initial CT scan showed a 22 × 14 mm lung nodule in the right lower lobe (white arrowhead), a 32 × 26 mm enlarged mediastinal lymph node in the right lower paratracheal region (white arrow), and a 50 × 31 mm mass in the seventh right rib (black arrow). (D-F): A CT scan 4 months after the biopsy showed the rib mass had disappeared and the size of the lung nodule and right lower paratracheal lymph node had decreased. (G-I): A CT scan 14 months after the biopsy showed the right lower paratracheal lymph node had regrown and a 36 × 24 mm upper paratracheal lymph node was present (red arrowhead). There was no apparent increase in the size of the lung nodule.