 thyroid disease), and systemic neurologic diseases.Congenital conditions that are implicated in VFP include neurological disorders like hydrocephalus and Arnold-Chiari malformation, dysmorphic neurological disorders such as Moebius syndrome or Goldenhar Syndrome, anatomical abnormalities such as a tracheoesophageal fistula, vascular anomalies (e.g.vascular ring) affecting the vocal mechanism, syndromes affecting brainstem function or atrophic diseases such as Charcot-Marie-Tooth.