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Role of pretreatment 18F-FDG PET/CT parameters in predicting outcome of non-endemic EBV DNA-related nasopharyngeal cancer (NPC) patients treated with IMRT and chemotherapy

  • Alessandra AlessiEmail author
  • Alice Lorenzoni
  • Anna Cavallo
  • Barbara Padovano
  • Nicola Alessandro Iacovelli
  • Paolo Bossi
  • Salvatore Alfieri
  • Gianluca Serafini
  • Carlotta Benedetta Colombo
  • Alessandro Cicchetti
  • Marta Mira
  • Lisa Licitra
  • Carlo Fallai
  • Flavio Crippa
  • Ester Orlandi
ONCOLOGY IMAGING

Abstract

Purpose

To evaluate the prognostic role of pretreatment 18F-FDG PET/CT metabolic parameters in non-endemic Epstein–Barr Virus (EBV DNA)-related nasopharyngeal cancer (NPC) patients treated with curative intensity-modulated radiation therapy (IMRT) with or without chemotherapy (CHT).

Materials/methods

We retrospectively reviewed clinical data of 160 consecutive non-metastatic NPC patients who received IMRT with or without CHT. Forty-nine out of 160 patients that underwent whole body 18F-FDG PET/CT at our institution for disease staging with a minimum follow-up to 12 months were included in this study. We evaluated the relationship between maximum and mean standardized uptake values (SUVmax and SUVmean, respectively), metabolic tumor volume and total lesion glycolysis (TLG) of primary tumor and cervical lymph nodes with disease-free survival (DFS) and overall survival (OS). We also investigated the prognostic role of clinical variables such as age, disease stage, plasma EBV DNA load (copies/ml), gross tumor volume of primary tumor and lymph nodes.

Results

Median follow-up was 55 months. Two- and 5-year OS were 95.8% and 90.5%, respectively, while DFS was 83.4% at both time points. SUVmax of primary tumor ≥ 18.8 g/ml and primary tumor TLG ≥ 203.1 g were significant prognostic factors of worse OS. Furthermore, stages IVB and EBV DNA load ≥ 3493 copies/ml were significantly associated with lower DFS. No correlation was found between PET parameters and plasma EBV DNA load.

Conclusion

Even in a limited series, our data suggested that SUVmax, SUVmean and TLG of primary tumor could predict a poor outcome in NPC patients also in non-endemic area hypothesizing their use for refinement of prognostication.

Keywords

FDG PET/CT Metabolic parameters NPC EBV DNA IMRT 

Notes

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical standards

The study have been approved by the institutional committee, and all procedure performed were in accordance with the ethical standards of the institutional committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

Informed consent

For this type of study, formal consent is not required.

Supplementary material

11547_2018_980_MOESM1_ESM.docx (634 kb)
Supplementary material 1 (DOCX 634 kb)

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Copyright information

© Italian Society of Medical Radiology 2018

Authors and Affiliations

  • Alessandra Alessi
    • 1
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  • Alice Lorenzoni
    • 1
  • Anna Cavallo
    • 2
  • Barbara Padovano
    • 1
  • Nicola Alessandro Iacovelli
    • 3
  • Paolo Bossi
    • 4
  • Salvatore Alfieri
    • 4
  • Gianluca Serafini
    • 1
  • Carlotta Benedetta Colombo
    • 1
  • Alessandro Cicchetti
    • 5
  • Marta Mira
    • 1
  • Lisa Licitra
    • 4
    • 6
  • Carlo Fallai
    • 3
  • Flavio Crippa
    • 1
  • Ester Orlandi
    • 3
  1. 1.Nuclear Medicine and PET UnitFondazione IRCCS Istituto Nazionale dei TumoriMilanItaly
  2. 2.Medical Physics UnitFondazione IRCCS Istituto Nazionale dei TumoriMilanItaly
  3. 3.Radiation Oncology Unit 2Fondazione IRCCS Istituto Nazionale dei TumoriMilanItaly
  4. 4.Medical Oncology Unit 3Fondazione IRCCS Istituto Nazionale dei TumoriMilanItaly
  5. 5.Prostate Cancer ProgramFondazione IRCCS Istituto Nazionale dei TumoriMilanItaly
  6. 6.University of MilanMilanItaly

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