title: Helpful CT findings for giving specific diagnosis of anterior mediastinal tumors.
abstract: OBJECTIVE
  To characterize the CT features of common anterior mediastinal tumors and evaluate CT findings that may help in suggesting specific diagnosis among these tumors.
  
  
  METHODS
  Fifty chest CT studies with pathological diagnosis of thymoma (n=28), mediastinal germ cell tumor (n=14) and lymphoma (n=8) were retrospectively reviewed by two radiologists who were blind to the pathological results. The CT findings of fat, cyst and calcification within the lesion, contrast enhancement, associated intrathoracic findings such as mediastinal invasion and lymph node enlargement were evaluated.
  
  
  RESULTS
  Fat density within the mass was present in 57.1% with germ cell tumor which was significantly higher than other anterior mediastinal tumors (p < 0.05). The presence of associated mediastinal lymphadenopathy was significantly found in lymphoma (75.0%) compared to other tumors (p < 0.05). The other CT findings showed no significant difference among these diseases (p > 0.05).
  
  
  CONCLUSIONS
  The CT findings that help in giving specific diagnosis of anterior mediastinal tumors which are fat attenuation and associated mediastinal lymphadenopathy. The presence off at attenuation is highly suggestive of germ cell tumor and anterior mediastinal mass associated with mediastinal lymphadenopathy elsewhere is indicative of lymphoma.
authors.affiliation: Department of Radiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
authors.forename: Kanyarat
authors.initials: K
authors.lastname: Totanarungroj
authors.forename: Chatchamanan
authors.initials: C
authors.lastname: Watcharaporn
authors.forename: Nisa
authors.initials: N
authors.lastname: Muangman
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D015331:Cohort Studies; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008223:Lymphoma / Q000000981:diagnostic imaging* / Q000473:pathology; D008297:Male; D008479:Mediastinal Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D008875:Middle Aged; D009373:Neoplasms, Germ Cell and Embryonal / Q000000981:diagnostic imaging* / Q000473:pathology; D011237:Predictive Value of Tests; D012189:Retrospective Studies; D013945:Thymoma / Q000000981:diagnostic imaging* / Q000473:pathology; D014057:Tomography, X-Ray Computed; D055815:Young Adult