Prognosis estimation under the light of metabolic tumor parameters on initial FDG-PET/CT in patients with primary extranodal lymphoma

  • Kursat Okuyucu Gulhane Military Medical Academy and School of Medicine
  • Sukru Ozaydin Gulhane Military Medical Academy and School of Medicine
  • Engin Alagoz Gulhane Military Medical Academy and School of Medicine
  • Gokhan Ozgur Gulhane Military Medical Academy and School of Medicine
  • Semra Ince Gulhane Military Medical Academy and School of Medicine
  • Fahrettin Guven Oysul Gulhane Military Medical Academy and School of Medicine
  • Ozlem Ozmen Ataturk Chest Diseases and Thoracic Surgery Training and Research Hospital
  • Murat Tuncel Hacettepe University
  • Mustafa Ozturk Gulhane Military Medical Academy and School of Medicine
  • Nuri Arslan Gulhane Military Medical Academy and School of Medicine

Abstract

Objective: Non-Hodgkin’s lymphomas arising from the tissues other than primary lymphatic organs are called primary extranodal lymphoma. Most of the studies evaluated metabolic tumor parameters in different organs and histopathologic variants of this disease generally for treatment response. We aimed to evaluate the prognostic value of metabolic tumor parameters derived from initial FDG-PET/CT in patients with a medley of primary extranodal lymphoma in this study.

Material and Methods: There are 67 patients with primary extranodal lymphoma for whom FDG-PET/CT was requested for primary staging. Quantitative PET/CT parameters (SUVmax, SUVmean, MTV, TLG) were used to estimate disease-free survival and overall survival.

Results: SUVmean, MTV and TLG were found statistically significant after multivariate analysis. SUVmean remained significant after ROC curve analysis. Sensitivity and specificity were calculated as 88% and 64%, respectively when the cut-off value of SUVmean was chosen as 5.15. After the investigation of primary presentation sites and histopathological variants according to recurrence, there is no difference amongst the variants. But primary site of extranodal lymphomas is statistically important (p=0.014). Testis and central nerve system lymphomas has higher recurrence rate (62.5%, 73%, respectively).

Conclusion: High SUVmean, MTV and TLG values obtained from primary staging FDG-PET/CT are potential risk factors for both disease-free survival and overall survival in primary extranodal lymphoma. SUVmean is the most significant one amongst them for estimating recurrence/metastasis. 

Author Biographies

Kursat Okuyucu, Gulhane Military Medical Academy and School of Medicine
Department of Nuclear Medicine
Sukru Ozaydin, Gulhane Military Medical Academy and School of Medicine
Department of Medical Oncology
Engin Alagoz, Gulhane Military Medical Academy and School of Medicine
Department of Nuclear Medicine
Gokhan Ozgur, Gulhane Military Medical Academy and School of Medicine
Department of Haematology
Semra Ince, Gulhane Military Medical Academy and School of Medicine
Department of Nuclear Medicine
Fahrettin Guven Oysul, Gulhane Military Medical Academy and School of Medicine
Department of Public Health
Ozlem Ozmen, Ataturk Chest Diseases and Thoracic Surgery Training and Research Hospital
Department of Nuclear Medicine
Murat Tuncel, Hacettepe University
Department of Nuclear Medicine
Mustafa Ozturk, Gulhane Military Medical Academy and School of Medicine
Department of Medical Oncology
Nuri Arslan, Gulhane Military Medical Academy and School of Medicine
Department of Nuclear Medicine
Published
2016-11-21
How to Cite
Okuyucu, K., Ozaydin, S., Alagoz, E., Ozgur, G., Ince, S., Oysul, F. G., Ozmen, O., Tuncel, M., Ozturk, M., & Arslan, N. (2016). Prognosis estimation under the light of metabolic tumor parameters on initial FDG-PET/CT in patients with primary extranodal lymphoma. Radiology and Oncology, 50(4). Retrieved from https://www.radioloncol.com/index.php/ro/article/view/2596
Section
Nuclear medicine