title: Ectopic thyroid in the retroesophageal superior mediastinum.
mesh_terms: D002828:Choristoma / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D006801:Humans; D008297:Male; D008479:Mediastinal Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D008875:Middle Aged; D013961:Thyroid Gland