Post-pneumonectomy syndrome in an adult presenting with positional syncope.

Post-pneumonectomy syndrome is a rare late complication of pneumonectomy, which is due to extreme mediastinal shift and rotation into the pneumonectomy space. Recurrent syncope following a right pneumonectomy in a 21-year-old woman was treated by insertion of an expandable silicone prosthesis into the pneumonectomy space.