Fig. 1.

53-year-old man with paraaortic lesion.

A. Diagnostic axial contrast enhanced CT scan that was obtained prior to biopsy procedure with patient in supine position shows 2-cm paraaortic mass lesion (arrow). B. Initial axial CT scan obtained with patient in prone position shows tracking scale crossing retrocaval mass lesion.

Distance from skin to leading edge of lesion was 10 cm. C. CT fluoroscopic image obtained during biopsy procedure shows safe insertion of biopsy needle (arrow) into lesion. Pathologic diagnosis was nodular sclerosis of Hodgkin's disease. D. CT scan immediately after two punctures reveals no complications.