May Be Caused by

 Common

Breast cancer

Disorder of recurrent laryngeal nerve

Esophageal carcinoma

Gunshot wound

Laryngeal carcinoma

Laryngitis

Lung cancer

Lymphoma

Mediastinal neoplasm

Mediastinal surgery

Radical neck dissection

Superior sulcus tumor

Thyroid cancer

Thyroid tumor

Thyroidectomy

Trauma

 Uncommon

Arytenoid dislocation

Birth injury

Cerebral lesion

Chiari I malformation

Chiari II malformation

Diabetic neuropathy

Idiopathic

Intracranial tumor

Jugular foramen neoplasm

Laryngocele

Tuberculosis

Vascular ring