title: Tracheal bronchus with metachronous tumor.
abstract: Tracheal bronchus, a bronchus arising from the lateral wall of the trachea, is a rare congenital anomaly. It is usually asymptomatic but symptoms could occur with relatively poor local drainage. There are a few cases of lung cancer within the tracheal bronchus reported in the literature; however, none of them were reported to be metachronous. A metachronous tumor is a second primary malignancy diagnosed >6 months after the diagnosis of the index tumor. We present a case of a squamous cell carcinoma originating in a tracheal bronchus of a 53-year-old patient previously diagnosed with a supraglottic malignancy.
authors.affiliation: Pulmonology Department, Hospital Center of Vila Nova de Gaia/Espinho, Vila Nova de Gaia, Portugal. caixadaregina@gmail.com
authors.forename: Regina
authors.initials: R
authors.lastname: Monteiro
authors.forename: Ivone
authors.initials: I
authors.lastname: Gonçalves
authors.forename: Bárbara
authors.initials: B
authors.lastname: Parente
authors.forename: João
authors.initials: J
authors.lastname: Moura e Sá
mesh_terms: D001980:Bronchi / Q000002:abnormalities*; D001984:Bronchial Neoplasms / Q000473:pathology; D001999:Bronchoscopy; D002294:Carcinoma, Squamous Cell / Q000473:pathology*; D004825:Epiglottis; D006801:Humans; D033162:Incidental Findings; D007822:Laryngeal Neoplasms / Q000473:pathology*; D008175:Lung Neoplasms / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D016609:Neoplasms, Second Primary / Q000473:pathology*; D014132:Trachea / Q000002:abnormalities*