title: Chest CT in patients with scleroderma: prevalence of asymptomatic esophageal dilatation and mediastinal lymphadenopathy.
abstract: OBJECTIVE
  The high-resolution CT findings of chronic diffuse interstitial lung disease associated with scleroderma have been reported previously. This study determined the prevalence of esophageal dilatation and mediastinal adenopathy on high-resolution CT scans in patients with this disease.
  
  
  METHODS
  We retrospectively reviewed the high-resolution CT scans of 25 patients with scleroderma who had diffuse interstitial lung disease. Esophageal dilatation was diagnosed if the esophagus below the aortic arch had a single, large, nonloculated collection of intraluminal air on four or more consecutive axial images and if the luminal diameter of such an air-filled esophagus exceeded 10 mm in the coronal plane. The presence of fluid or an air-fluid level was also considered abnormal. For mediastinal adenopathy, we used the American Thoracic Society lymph node mapping scheme and the size criteria described previously.
  
  
  RESULTS
  Asymptomatic esophageal dilatation was detected in 20 patients (80%) and mediastinal adenopathy was present in 15 (60%).
  
  
  CONCLUSIONS
  Our results suggest that CT is useful in the detection of mediastinal adenopathy and asymptomatic esophageal involvement in patients with scleroderma. These findings can be used to narrow the differential diagnosis in patients in whom CT shows diffuse interstitial lung disease. Furthermore, the early detection of esophageal involvement in these patients shows the need for treatment to forestall the complications of esophageal dysmotility and accompanying chronic gastroesophageal reflux.
authors.affiliation: Department of Radiology, Masschusetts General Hospital, Boston 02114.
authors.forename: M
authors.initials: M
authors.lastname: Bhalla
authors.forename: R M
authors.initials: RM
authors.lastname: Silver
authors.forename: J A
authors.initials: JA
authors.lastname: Shepard
authors.forename: T C
authors.initials: TC
authors.lastname: McLoud
mesh_terms: D000328:Adult; D004108:Dilatation, Pathologic; D004935:Esophageal Diseases / Q000000981:diagnostic imaging* / Q000453:epidemiology / Q000209:etiology; D005260:Female; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D008206:Lymphatic Diseases / Q000000981:diagnostic imaging* / Q000453:epidemiology / Q000209:etiology; D008297:Male; D008482:Mediastinum; D008875:Middle Aged; D015995:Prevalence; D012189:Retrospective Studies; D012595:Scleroderma, Systemic / Q000150:complications*; D014057:Tomography, X-Ray Computed