Upper thoracoabdominal aortic repair through partial posterior incision of the diaphragm via left thoracotomy.

: During surgical repair of a thoracoabdominal aortic aneurysm, division of the diaphragm should be minimized to avoid pulmonary complications. We herein describe a modified exposure technique that avoids ordinary circumferential division of the diaphragm. The diaphragm was detached from the aneurysm at the level of the aortic hiatus via a modified anterior lateral thoracotomy incision through the pleural space. The diaphragmatic incision around the aneurysm was extended posteriorly. This partial division of the diaphragm provided sufficient exposure of the distal anastomosis site for thoracoabdominal aneurysms that do not extend below the upper part of the abdomen.