Erschienen in:
10.03.2016 | Head and Neck
Combining standardized uptake value of FDG-PET and apparent diffusion coefficient of DW-MRI improves risk stratification in head and neck squamous cell carcinoma
verfasst von:
Lorenzo Preda, Giorgio Conte, Luke Bonello, Caterina Giannitto, Laura L. Travaini, Sara Raimondi, Paul E. Summers, Ansarin Mohssen, Daniela Alterio, Maria Cossu Rocca, Chiara Grana, Francesca Ruju, Massimo Bellomi
Erschienen in:
European Radiology
|
Ausgabe 12/2016
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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