Vocal cord palsy is not caused by:
(a) Vertebral secondaries(Ref. Scott Brown, 6th ed., 1/12/17)Superior and recurrent laryngeal nerves are not in close proximity to vertebrae.Rest of the given (mediastinal) conditions can cause left recurrent laryngeal nerve palsy.
Vertebral secondaries
Left atrial enlargement
Bronchogenic carcinoma
Secondaries in mediastinum
Larynx