RT Journal A1 Newton CR, Victorino GP T1 IMage of the month—quiz case JF Archives of Surgery JO Archives of Surgery YR 2003 FD March 1 VO 138 IS 3 SP 341 OP 341 DO 10.1001/archsurg.138.3.341 UL http://dx.doi.org/10.1001/archsurg.138.3.341 AB After a biopsy of the mass guided by means of computed tomography, she underwent an elective thoracotomy. The mass was confined to the right side of the upper chest cavity, with significant compression of the right lung. It measured 12 × 16 cm and weighed 920 g.