<prompt> The first step when doing a penumononectomy for cancer of the bronchus is to -Ligate the pulmonary veinLigate pulmonary arteryDivide the bronchusPerform lymphnode clearance  <response>: Pneumonectomy is anatomically more straightforward than lobectomy in carcinoma bronchus: The pulmonary artery is first dissected, divided and sutured. The pulmonary veins are then isolated, divided and sutured. The main bronchus is divided so that no blind stump remains. The technique of stump closure is important if a bronchopleural fistula is to be avoided. The tissues are carefully handled and the stump is usually stapled. 