Abstract
Objectives
We assessed whether quantitative imaging biomarkers derived from fluorodeoxyglucose-positron emission tomography (18F-FDG PET) could be extracted from perineural spread (PNS) in head and neck malignancies (HNM) to improve patient risk stratification.
Methods
A case–control exploratory study (1:2 ratio) enrolled 81 patients with FDG-avid HNM. The case-group comprised 28 patients with documented PNS (reference: expert consensus), including 14 squamous cell carcinomas (SCC). Imaging biomarkers were extracted from the PNS on 18F-FDG PET, CT-scan, and MRI. The control-group enrolled 53 SCCs. The Cox proportional-hazards regression model explored the association with overall survival by univariate and multivariate analyses.
Results
The rate of PNS detection by 18F-FDG PET was 100% in the case-group. Quantitative imaging biomarkers were not associated with the presence of sensory (p>0.20) or motor (p>0.10) symptoms. In SCC patients (case: 14; control: 53), PNS was associated with a hazard ratio of death of 5.5 (95%CI: 1.4:20.9) by multivariate analysis. Increased cranial nerve SUVmax was significantly associated with poorer overall survival by univariate analysis (p=0.001).
Conclusions
Our pilot study showed the feasibility of extracting 18F-FDG PET biomarkers from PNS in FDG-avid HNM. Our results encourage the development of new PET/CT- or PET/MRI-guided management strategies in further prospective studies.
Key Points
• 18F-FDG PET/CT detects PNS in FDG-avid HNM.
• PNS metabolism is more heterogeneous than healthy tissue.
• PNS diagnosis is crucial: most patients were asymptomatic, N0 and M0.
• PNS diagnosis is associated with poorer overall survival in SCC.
• PET/CT- or PET/MRI-guided management strategies should be evaluated.
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Abbreviations
- PNS:
-
Perineural spread
- SUV:
-
Standardised uptake value
- HISUV:
-
Heterogeneity index of the standardised uptake value
- V1 :
-
Ophthalmic branch of the trigeminal nerve
- V2 :
-
Maxillary branch of the trigeminal nerve
- V3 :
-
Mandibular branch of the trigeminal nerve
- VII:
-
Facial nerve
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Funding
Laurent Dercle is funded by Fondation Philanthropia (Geneva, Switzerland) and the ARC Foundation (Villejuif, France).
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The scientific guarantor of this publication is Laurent Dercle.
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The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article.
Statistics and biometry
One of the authors has significant statistical expertise, and no complex statistical methods were necessary for this paper.
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Written informed consent was waived by the institutional review board.
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Institutional review board approval was obtained.
Methodology
Retrospective case–control study, performed at one institution
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Dercle, L., Hartl, D., Rozenblum-Beddok, L. et al. Diagnostic and prognostic value of 18F-FDG PET, CT, and MRI in perineural spread of head and neck malignancies. Eur Radiol 28, 1761–1770 (2018). https://doi.org/10.1007/s00330-017-5063-x
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DOI: https://doi.org/10.1007/s00330-017-5063-x