title: Endolaryngeal extension of thyroglossal duct cyst.
abstract: Thyroglossal duct cysts are the most common congenital neck masses that develop during childhood, The masses develop from remnants of thyroglossal ducts, and typically appear as midline neck masses. Endolaryngeal extension of thyroglossal duct cysts has been reported mostly as midline neck swelling. We observed a case of extension of the thyroglossal duct cyst to the supraglottic area without neck swelling. A 50-year-old man presented with a 1-month history of foreign-body sensation in the throat. Fiberscopic and radiologic findings were similar to those associated with a saccular cyst, but its proximity to the hyoid bone raised the possibility of thyroglossal duct cyst. Operation was performed via an external incision to completely remove the cyst. Postoperative fiberscopy revealed that the aryepiglottic fold swelling had disappeared. Diagnosis of thyroglossal duct cyst was confirmed on the basis of pathological findings. In cases in which it is difficult to remove the cyst from the hyoid membrane, the hyoid bone midline portion should be dissected. Thyroglossal duct cysts should be considered in cases with a submucosal tumor in the supraglottic region, and radiological examinations should be performed.
authors.affiliation: Department of Otolaryngology-Bronchoesophagology, Kyoto Second Red Cross Hospital, Kyoto, Japan. hbando@koto.kpu-m.ac.jp
authors.forename: Hideki
authors.initials: H
authors.lastname: Bando
authors.forename: Masaya
authors.initials: M
authors.lastname: Uchida
authors.forename: Sachie
authors.initials: S
authors.lastname: Matsumoto
authors.forename: Chihisa
authors.initials: C
authors.lastname: Ushijima
authors.forename: Kenji
authors.initials: K
authors.lastname: Dejima
mesh_terms: D003937:Diagnosis, Differential; D005500:Follow-Up Studies; D006801:Humans; D006928:Hyoid Bone / Q000473:pathology / Q000601:surgery; D007828:Laryngoscopy; D007830:Larynx / Q000473:pathology* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D013955:Thyroglossal Cyst / Q000473:pathology* / Q000601:surgery; D013957:Thyroid Cartilage / Q000473:pathology / Q000601:surgery; D014057:Tomography, X-Ray Computed