title: [Primary tracheobronchial amyloidosis].
abstract: Amyloidosis is a disease characterized by extracellular deposition of fibrillar protein in organs and tissues. Primary tracheal amyloidosis is rare. We report here a case of a 55-year-old man with tracheal amyloidosis hospitalized for acute respiratory insufficiency and with a history of recent episodes of pneumonia. Chest X-ray and chest computed tomography showed tracheal obstruction due to a tumor. A passage was created in order to relieve the symptoms. Histological examination (Congo red staining) revealed amyloid deposits but no evidence of neoplasia. Although this is a rare clinical condition, its importance is discussed regarding the differential diagnosis of tracheal tumors and the repercussions for therapeutic decision-making.
authors.affiliation: Hospital São Lucas, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brasil.
authors.forename: Gustavo
authors.initials: G
authors.lastname: Chatkin
authors.forename: Mauríco
authors.initials: M
authors.lastname: Pipkin
authors.forename: José Antonio Figueiredo
authors.initials: JA
authors.lastname: Pinto
authors.forename: Vinicius Duval da
authors.initials: VD
authors.lastname: Silva
authors.forename: José Miguel
authors.initials: JM
authors.lastname: Chatkin
mesh_terms: D000402:Airway Obstruction / Q000209:etiology / Q000601:surgery; D000686:Amyloidosis / Q000473:pathology* / Q000601:surgery; D001982:Bronchial Diseases / Q000473:pathology* / Q000601:surgery; D001999:Bronchoscopy; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed; D014133:Tracheal Diseases / Q000473:pathology* / Q000601:surgery