title: Magnetic resonance imaging and 67gallium scan in mediastinal malignant lymphoma: a prospective pilot study.
abstract: BACKGROUND
  A residual mediastinal mass is common after treatment for bulky mediastinal lymphoma and represents a difficult diagnostic problem.
  
  
  METHODS
  19 patients with bulky mediastinal masses due to malignant lymphoma had computed tomography (CT), magnetic resonance imaging (MRI) and 67Gallium scan (67Ga) before treatment, after four cycles of chemotherapy, and two, six and twelve months after end of treatment.
  
  
  RESULTS
  MRI and 67Ga showed active tumor in all patients before treatment. Twelve months after treatment full consistency was found between the results of the two techniques. During treatment and the first six months after treatment, the two techniques were not in accord in some patients, partly due to later normalization of MRI compared with 67Ga.
  
  
  CONCLUSIONS
  Both MRI and 67Ga are useful in assessing tumor activity in lymphoma mediastinal masses.
authors.affiliation: Department of Medical Oncology and Radiotherapy, Norwegian Radium Hospital, Oslo.
authors.forename: A F
authors.initials: AF
authors.lastname: Abrahamsen
authors.forename: H H
authors.initials: HH
authors.lastname: Lien
authors.forename: M
authors.initials: M
authors.lastname: Aas
authors.forename: M
authors.initials: M
authors.lastname: Winderen
authors.forename: B
authors.initials: B
authors.lastname: Hager
authors.forename: S
authors.initials: S
authors.lastname: Kvaløy
authors.forename: R F
authors.initials: RF
authors.lastname: Elgjo
authors.forename: O
authors.initials: O
authors.lastname: Nome
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D005500:Follow-Up Studies; D005710:Gallium Radioisotopes; D006689:Hodgkin Disease / Q000175:diagnosis / Q000000981:diagnostic imaging; D006801:Humans; D008223:Lymphoma / Q000175:diagnosis* / Q000000981:diagnostic imaging; D008228:Lymphoma, Non-Hodgkin / Q000175:diagnosis / Q000000981:diagnostic imaging; D008279:Magnetic Resonance Imaging; D008297:Male; D008479:Mediastinal Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging; D008875:Middle Aged; D010865:Pilot Projects; D011237:Predictive Value of Tests; D011446:Prospective Studies; D011877:Radionuclide Imaging; D012680:Sensitivity and Specificity
chemical_list: D005710:Gallium Radioisotopes