title: Lateral laryngopharyngeal diverticulum: anatomical and videofluoroscopic study.
abstract: The aims were to characterize the anatomical region where the lateral laryngopharyngeal protrusion occurs and to define if this protrusion is a normal or a pathological entity. This protrusion was observed on frontal contrasted radiographs as an addition image on the upper portion of the laryngopharynx. We carried out a plane-by-plane qualitative anatomical study through macroscopic and mesoscopic surgical dissection on 12 pieces and analyzed through a videofluoroscopic method on frontal incidence the pharyngeal phase of the swallowing process of 33 patients who had a lateral laryngopharyngeal protrusion. The anatomical study allowed us to identify the morphological characteristics that configure the high portion of the piriform recess as a weak anatomical point. The videofluoroscopic study allowed us to observe the laryngopharyngeal protrusion and its relation to pharyngeal repletion of the contrast medium. All kinds of the observed protrusions could be classified as "lateral laryngopharyngeal diverticula." The lateral diverticula were more frequent in older people. These lateral protrusions can be found on one or both sides, usually with a small volume, without sex or side prevalence. This formation is probably a sign of a pharyngeal transference difficulty associated with a deficient tissue resistance in the weak anatomical point of the high portion of the piriform recess.
authors.affiliation: Laboratório de Motilidade Digestiva e Imagem, S. F1-008, Departamento de Anatomia, Universidade Federal do Rio de Janeiro ICB/CCS/UFRJ, Brazil. mcosta@acd.ufrj.br
authors.forename: Milton Melciades Barbosa
authors.initials: MM
authors.lastname: Costa
authors.forename: Hilton Augusto
authors.initials: HA
authors.lastname: Koch
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001466:Barium Sulfate; D002102:Cadaver; D002933:Cineradiography / Q000379:methods*; D003287:Contrast Media; D003679:Deglutition / Q000502:physiology; D003680:Deglutition Disorders / Q000000981:diagnostic imaging; D004240:Diverticulum / Q000000981:diagnostic imaging*; D004825:Epiglottis / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D006928:Hyoid Bone / Q000000981:diagnostic imaging; D007818:Laryngeal Diseases / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D010608:Pharyngeal Diseases / Q000000981:diagnostic imaging*; D010609:Pharyngeal Muscles / Q000000981:diagnostic imaging; D010614:Pharynx / Q000000981:diagnostic imaging / Q000503:physiopathology; D013957:Thyroid Cartilage / Q000000981:diagnostic imaging; D014741:Video Recording
chemical_list: D003287:Contrast Media; D001466:Barium Sulfate