Diagnostic and prognostic impact of 18F-FDG PET/CT in follicular lymphoma

  • Ludovic Le Dortz
  • Sophie De Guibert
  • Sahar Bayat
  • Anne Devillers
  • Roch Houot
  • Yan Rolland
  • Marc Cuggia
  • Florence Le Jeune
  • Haïfa Bahri
  • Marie-Luce Barge
  • Thierry Lamy
  • Etienne Garin
Original Article

DOI: 10.1007/s00259-010-1539-5

Cite this article as:
Le Dortz, L., De Guibert, S., Bayat, S. et al. Eur J Nucl Med Mol Imaging (2010) 37: 2307. doi:10.1007/s00259-010-1539-5

Abstract

Purpose

The aim of this study was to assess the usefulness of positron emission tomography/computed tomography in staging, prognosis evaluation and restaging of patients with follicular lymphoma.

Methods

A retrospective study was performed on 45 patients with untreated biopsy-proven follicular lymphoma who underwent 18F-fluorodeoxyglucose PET/CT (FDG PET/CT) and CT before and after chemoimmunotherapy induction treatment (rituximab combined with cyclophosphamide, doxorubicin, vincristine and prednisone).

Results

PET/CT detected more nodal (+51%) and extranodal (+89%) lesions than CT. PET/CT modified Ann Arbor staging in eight patients (18%). Five patients (11%) initially considered as being early stage (I/II) were eventually treated as advanced stage (III/IV). In this study, an initial PET/CT prognostic score was significantly more accurate than the Follicular Lymphoma International Prognostic Index score in identifying patients with poor prognosis (i.e. patients with incomplete therapeutic response or early relapse). The accuracy of PET/CT for therapeutic response assessment was higher than that of CT (0.97 vs 0.64), especially due to its ability to identify inactive residual masses. In addition, post-treatment PET/CT was able to predict patients’ outcomes. The median progression-free survival was 48 months in the PET/CT-negative group as compared with 17.2 months for the group with residual uptake (p < 10−4).

Conclusion

FDG PET/CT is useful for staging and assessing the prognosis and therapeutic response of patients with follicular lymphoma.

Keywords

PET Follicular lymphoma Prognosis Therapeutic response 18F-FDG 

Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Ludovic Le Dortz
    • 1
    • 2
  • Sophie De Guibert
    • 3
  • Sahar Bayat
    • 4
  • Anne Devillers
    • 1
  • Roch Houot
    • 3
  • Yan Rolland
    • 5
  • Marc Cuggia
    • 4
  • Florence Le Jeune
    • 1
  • Haïfa Bahri
    • 1
  • Marie-Luce Barge
    • 1
  • Thierry Lamy
    • 3
    • 6
  • Etienne Garin
    • 1
    • 2
  1. 1.Nuclear Medicine DepartmentEugène Marquis Anticancer CentreRennesFrance
  2. 2.Inserm U991RennesFrance
  3. 3.Haematological DepartmentCHU PontchaillouRennesFrance
  4. 4.Medical Information DepartmentCHU PontchaillouRennesFrance
  5. 5.Medical Imaging DepartmentEugène Marquis Anticancer CentreRennesFrance
  6. 6.Inserm U917RennesFrance