Clamshell approach and partial cardiopulmonary bypass to repair a right aortic arch aneurysm. 
AB A 27-year-old man with history of ventricular septal defect repair in infancy presented with aneurysm of Edwards type IIIB right aortic arch.  Karyotype analysis excluded chromosome 22 anomalies.  The lesion was repaired using beating heart partial cardiopulmonary bypass via a clamshell incision.  Postoperative course was uneventful.