<prompt> Vocal cord palsy is not caused by:Vertebral secondariesLeft atrial enlargementBronchogenic carcinomaSecondaries in mediastinum  <response>: a Vertebral secondariesRef. Scott Brown, 6th ed., 11217Superior and recurrent laryngeal nerves are not in close proximity to vertebrae.Rest of the given mediastinal conditions can cause left recurrent laryngeal nerve palsy. 