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A carcionoma at the orifice of the left main bronchus is generally considered inoperable. Since 1963, in six patients, we have mobilised the transverse aortic arch and, working above the aortic arch, cut the left main bronchus off the trachea and closed the stump. The operation is completed as a pneumonectomy; it is referred to as a supra-aortic pneumonectomy. The indications, technique, and results are described.
