title: Bronchoalveolar carcinoma: histopathologic study of evolution in a series of 105 surgically treated patients.
abstract: OBJECTIVE
  The clinical characteristics, histopathologic condition, and outcome of bronchoalveolar carcinoma (BAC) were studied to detect possible prognostic indicators.
  
  
  METHODS
  A retrospective review was conducted of 97 patients who had a curative resection for BAC between 1975 and 1993.
  
  
  METHODS
  There were 83 men and 14 women with a mean age of 59 years (30 to 75 years).
  
  
  METHODS
  Resection comprised lobectomy in 84 cases (87%), bilobectomy, pneumonectomy, and a wedge excision.
  
  
  RESULTS
  Sixty-two percent of patients were asymptomatic. The radiographic pattern was a solitary nodule in 85% of patients and lobar pneumonitis or diffuse infiltrate in 15%. In 12% of patients, the solitary lesion had been stable for period of 2 to 7 years before diagnosis. The TNM staging of the disease included 71 patients with stage I, 14 with stage II, and 12 with stage IIIA. Review of the gross pathologic features revealed well-circumscribed tumors in 88% of patients and diffuse or multifocal tumors in 12%. Mucinous differentiation was present in 43% of patients, vascular invasion in 22%, and aerogenous spread in 49%. Overall survival was 89% at 1 year, 76% at 2 years, 48% at 5 years, and 39% at 10 years. The survival curves according to histologic features showed a statistically significant difference between diffuse lesions and nodular lesions, between lesions with and without aerogenous spread (diffuse lesions excluded), and between lesions with and without vascular invasion.
  
  
  CONCLUSIONS
  The natural history of BAC is especially influenced by its nodular or diffuse nature, vascular invasion, and aerogenous spread.
authors.affiliation: Department of Thoracic Surgery, Hôpital Trousseau, CHU de Tours, France.
authors.forename: P
authors.initials: P
authors.lastname: Dumont
authors.forename: B
authors.initials: B
authors.lastname: Gasser
authors.forename: C
authors.initials: C
authors.lastname: Rougé
authors.forename: G
authors.initials: G
authors.lastname: Massard
authors.forename: J M
authors.initials: JM
authors.lastname: Wihlm
mesh_terms: D002282:Adenocarcinoma, Bronchiolo-Alveolar / Q000000981:diagnostic imaging / Q000473:pathology* / Q000556:secondary / Q000601:surgery; D000328:Adult; D000368:Aged; D001999:Bronchoscopy; D002423:Cause of Death; D002454:Cell Differentiation; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D009077:Mucins; D009361:Neoplasm Invasiveness; D009364:Neoplasm Recurrence, Local / Q000473:pathology; D009367:Neoplasm Staging; D011013:Pneumonectomy; D011018:Pneumonia, Pneumococcal / Q000000981:diagnostic imaging; D011379:Prognosis; D012189:Retrospective Studies; D003074:Solitary Pulmonary Nodule / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D015996:Survival Rate; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome
chemical_list: D009077:Mucins