title: [Prevalence of adrenal incidentaloma at computed tomography (chest and abdominal) in a general hospital in Brazil].
abstract: OBJECTIVE
  To prospectively determine the prevalence of incidental adrenal lesions at computed tomography (CT) at an University Hospital in Brazil.
  
  
  METHODS
  A cross-sectional prospective study was performed to evaluate 3,382 consecutive patients with no known adrenal disease or malignancies who underwent chest and abdominal CT scans over a ten-month period. The cases of adrenal incidentaloma were defined by the presence of any change in gland contour, size or density. Kappa values were calculated, evaluating the intra and inter-observer agreement.
  
  
  RESULTS
  One hundred and one incidental adrenal masses were identified, corresponding to 83 cases and a prevalence of 2.5% (CI 95%: 1.0%-3.2%). Male patients presented a higher prevalence of incidentaloma than female (3.3% vs. 1.5%; p= 0.01). There was a significant association between older age and higher frequency of incidentaloma. Kappa of 0.76 and 0.83 (good and excellent agreement, respectively), were obtained in evaluating the intra and inter-observer agreements.
  
  
  CONCLUSIONS
  The prevalence of adrenal incidentaloma detected by CT was similar to that of various published retrospective clinical series. The two factors that independently influenced the distribution of incidentalomas were older age and being male.
authors.affiliation: Serviço de Radiologia, Hospital de Clínicas de Porto Alegre, Faculdade de Medicina, UFRGS, Porto Alegre, RS. elecivaz@terra.com.br
authors.forename: Eleci V
authors.initials: EV
authors.lastname: Ferreira
authors.forename: Mauro A
authors.initials: MA
authors.lastname: Czepielewski
authors.forename: Carlos Sasso
authors.initials: CS
authors.lastname: Faccin
authors.forename: Melissa Coral
authors.initials: MC
authors.lastname: Accordi
authors.forename: Alvaro Porto Alegre
authors.initials: AP
authors.lastname: Furtado
mesh_terms: D000293:Adolescent; D000310:Adrenal Gland Neoplasms / Q000000981:diagnostic imaging* / Q000453:epidemiology; D000328:Adult; D017677:Age Distribution; D001938:Brazil / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D005260:Female; D006769:Hospitals, General; D006801:Humans; D033162:Incidental Findings; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D015995:Prevalence; D011446:Prospective Studies; D017678:Sex Distribution; D014057:Tomography, X-Ray Computed