title: Whole-body positron emission tomography/computed tomography imaging and staging of orbital lymphoma.
abstract: OBJECTIVE
  To report the use of whole-body positron emission tomography fused with computed tomography (PET/CT) for the diagnosis and staging of orbital lymphoma.
  
  
  METHODS
  Retrospective observational case series.
  
  
  METHODS
  Four patients with biopsy-proven orbital lymphoma were evaluated by 18-fluoro-2-deoxyglucose whole-body PET/CT imaging.
  
  
  METHODS
  Positron emission tomography/CT images were studied for the presence of glucose uptake. Foci were considered suspicious based on their standardized uptake values (SUVs). Physiologic images (PET) and their anatomic counterparts (CT) were fused to allow form and function to be evaluated on the same diagnostic page.
  
  
  METHODS
  Positron emission tomography/CT images were assessed for foci with abnormally high SUVs that correlated with biopsy-proven lymphoma.
  
  
  RESULTS
  Positron emission tomography/CT detected orbital lymphoma in 3 patients (75%). It also revealed systemic lymphoma in 2 of the 4 patients. The 2 patients found to have systemic lymphoma were diagnosed to have extranodal marginal zone B-cell orbital lymphoma of the mucosa-associated lymphoid tissue (MALT) type. Similarly, the 2 with negative PET/CT results also had orbital MALT-type lymphoma. We found that PET/CT imaging helped guide further management in all 4 patients.
  
  
  CONCLUSIONS
  Positron emission tomography/CT should be considered as a new method of diagnosing, staging, and restaging patients with orbital lymphomas.
authors.affiliation: New York Eye Cancer Center, New York, New York 10021, USA.
authors.forename: Richard H
authors.initials: RH
authors.lastname: Roe
authors.forename: Paul T
authors.initials: PT
authors.lastname: Finger
authors.forename: Madhavi
authors.initials: M
authors.lastname: Kurli
authors.forename: Lawrence B
authors.initials: LB
authors.lastname: Tena
authors.forename: Codrin E
authors.initials: CE
authors.lastname: Iacob
mesh_terms: D000368:Aged; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D003131:Combined Modality Therapy; D005260:Female; D019788:Fluorodeoxyglucose F18; D006801:Humans; D007167:Immunotherapy; D018442:Lymphoma, B-Cell, Marginal Zone / Q000000981:diagnostic imaging* / Q000473:pathology / Q000628:therapy; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D009918:Orbital Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology / Q000628:therapy; D049268:Positron-Emission Tomography; D019275:Radiopharmaceuticals; D011882:Radiotherapy, High-Energy; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed; D051598:Whole Body Imaging
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18