title: Chest wall and mediastinal invasion by lung cancer: evaluation with multisection expiratory dynamic CT.
abstract: OBJECTIVE
  To assess the utility of multisection expiratory dynamic (ED) computed tomography (CT) in evaluation of tumor invasion in the chest wall or mediastinum.
  
  
  METHODS
  Fifteen patients with lung cancer underwent multisection ED CT. At each section level, 10 images were obtained at an interval of 1 second during a single expiratory maneuver. These images were evaluated in cine mode to assess tumoral movement along the chest wall or mediastinum.
  
  
  RESULTS
  ED CT showed that the tumors in five patients were fixed to the chest wall (n = 2) or mediastinum (n = 3); free movement of tumor along the peripheral (n = 7) or mediastinal (n = 3) pleura was proved in the 10 other patients. At pathologic examination, the ED CT findings were proved correct in all patients. In six patients, ED CT provided additional information about tumor invasion that could not be obtained with conventional criteria.
  
  
  CONCLUSIONS
  Multisection ED CT may improve the accuracy of CT in prediction of chest wall or mediastinal invasion of lung cancer.
authors.affiliation: Department of Radiology, Shiga University of Medical Science, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Murata
authors.forename: M
authors.initials: M
authors.lastname: Takahashi
authors.forename: M
authors.initials: M
authors.lastname: Mori
authors.forename: K
authors.initials: K
authors.lastname: Shimoyama
authors.forename: A
authors.initials: A
authors.lastname: Mishina
authors.forename: S
authors.initials: S
authors.lastname: Fujino
authors.forename: H
authors.initials: H
authors.lastname: Itoh
authors.forename: R
authors.initials: R
authors.lastname: Morita
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D008297:Male; D008482:Mediastinum / Q000000981:diagnostic imaging* / Q000473:pathology; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D013902:Radiography, Thoracic; D013909:Thorax / Q000473:pathology; D014057:Tomography, X-Ray Computed / Q000379:methods