Abstract
Objectives
To assess the independent prognostic value of standardized uptake value (SUV) and apparent diffusion coefficient (ADC), separately and combined, in order to evaluate if the combination of these two variables allows further prognostic stratification of patients with head and neck squamous cell carcinomas (HNSCC).
Methods
Pretreatment SUV and ADC were calculated in 57 patients with HNSCC. Mean follow-up was 21.3 months. Semiquantitative analysis of primary tumours was performed using SUVmaxT/B, ADCmean, ADCmin and ADCmax. The prognostic value of SUVmaxT/B, ADCmean, ADCmin and ADCmax in predicting disease-free survival (DFS) was evaluated with log-rank test and Cox regression models.
Results
Patients with SUVmaxT/B ≥5.75 had an overall worse prognosis (p = 0.003). After adjusting for lymph node status and diameter, SUVmaxT/B and ADCmin were both significant predictors of DFS with hazard ratio (HR) = 10.37 (95 % CI 1.22–87.95) and 3.26 (95 % CI 1.20–8.85) for SUVmaxT/B ≥5.75 and ADCmin ≥0.58 × 10−3 mm2/s, respectively. When the analysis was restricted to subjects with SUVmaxT/B ≥5.75, high ADCmin significantly predicted a worse prognosis, with adjusted HR = 3.11 (95 % CI 1.13–8.55).
Conclusions
The combination of SUVmaxT/B and ADCmin improves the prognostic role of the two separate parameters; patients with high SUVmaxT/B and high ADCmin are associated with a poor prognosis.
Key Points
• High SUV maxT/B is a poor prognostic factor in HNSCC
• High ADC min is a poor prognostic factor in HNSCC
• In patients with high SUV maxT/B , high ADC min identified those with worse prognosis
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Abbreviations
- ADC:
-
Apparent diffusion coefficient
- CT:
-
Computed tomography
- DW:
-
Diffusion-weighted
- FDG:
-
Fluorodeoxyglucose
- HNSCC:
-
Head and neck squamous cell carcinoma
- MRI:
-
Magnetic resonance imaging
- PET:
-
Positron-emission tomography
- ROI:
-
Region of interest
- SUV:
-
Standardized uptake value
- TSE:
-
Turbo spin echo
- VOI:
-
Volumetric region of interest
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Acknowledgments
The scientific guarantor of this publication is Dr. Lorenzo Preda. 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. The authors state that this work has not received any funding. Sara Raimondi kindly provided statistical advice for this manuscript. Written informed consent was obtained from all subjects (patients) in this study. Institutional review board approval was not required because this study was a retrospective analysis of data acquired during clinical practice and all the patients had signed an informed consent to the use of clinical and imaging data for scientific and/or educational purposes.
Methodology: observational study, performed at one institution.
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Preda, L., Conte, G., Bonello, L. et al. Combining standardized uptake value of FDG-PET and apparent diffusion coefficient of DW-MRI improves risk stratification in head and neck squamous cell carcinoma. Eur Radiol 26, 4432–4441 (2016). https://doi.org/10.1007/s00330-016-4284-8
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DOI: https://doi.org/10.1007/s00330-016-4284-8