Nodal parameters of FDG PET/CT performed during radiotherapy for locally advanced mucosal primary head and neck squamous cell carcinoma can predict treatment outcomes: SUVmean and response rate are useful imaging biomarkers
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To evaluate the prognostic utility of nodal metabolic parameters derived from FDG PET/CT performed before radiotherapy (prePET) and during the third week of radiotherapy (iPET) in patients with mucosal primary head and neck squamous cell carcinoma (MPHNSCC).
This analysis included 75 patients with newly diagnosed locally advanced node-positive MPHNSCC treated with radical radiotherapy and concurrent systemic therapy who underwent prePET and iPET: N1 11 patients, N2a 38, N2b 12, N2c 9, N3 5. The median follow-up was 28 months (9 – 70 months). The maximum and mean standardized uptake values (SUVmax and SUVmean), metabolic tumour volume (MTV) and total lesional glycolysis (TLG) of the index lymph node (node with the highest TLG) and the combined total lymph nodes, and their percentage reductions on iPET were determined, and the results were correlated with 3-year Kaplan-Meier locoregional, regional and distant metastatic failure-free survival (FFS), disease-free survival (DFS) and overall survival (OS). Optimal cut-off values were derived from receiver operating characteristic curves. Cox regression univariate and multivariate analyses with clinical covariates were performed.
Based on assessment of residual nodal metabolic burden during treatment, the iPET index node SUVmean (optimal cut-off value 2.95 g/ml) and the total node SUVmean (optimal cut-off value 3.25) were the best independent predictors of outcome in the multivariate analysis: index node SUVmean for DFS and OS p = 0.033 and 0.003, respectively, and the total node SUVmean for locoregional FFS, DFS and OS p = 0.028, 0.025 and 0.014, respectively. Based on the assessment of response rates during treatment, a reduction of more than 50 % in the total node TLG was the best biomarker for locoregional and regional FFS, DFS and OS in the multivariate analysis (p = 0.001, 0.016, 0.001 and 0.004, respectively), and reduction in the total node MTV for locoregional FFS, DFS and OS (p = 0.026, 0.003 and 0.014, respectively). There were no significant correlations between oncological outcomes and prePET nodal parameters.
We demonstrated that the index node and total node SUVmean on iPET and a reduction of more than 50 % in MTV and TLG are useful imaging biomarkers, and can potentially identify those patients with MPHNSCC who have a high risk of locoregional metastatic failure and death.
KeywordsMucosal primary head and neck squamous cell carcinoma FDG PET/CT Positron emission tomography Radiotherapy Imaging biomarkers
Compliance with ethical standards
Conflicts of interest
This study was approved by the local research ethics committee (Sydney South West Area Health Service Human Research Ethics Committee). For this type of study, formal consent is not required.
- 7.Castaldi P, Rufini V, Bussu F, Micciche F, Dinapoli N, Autorino R, et al. Can “early” and “late”18F-FDG PET-CT be used as prognostic factors for the clinical outcome of patients with locally advanced head and neck cancer treated with radio-chemotherapy? Radiother Oncol. 2012;103(1):63–8.CrossRefPubMedGoogle Scholar
- 9.Hentschel M, Appold S, Schreiber A, Abolmaali N, Abramyuk A, Dorr W, et al. Early FDG PET at 10 or 20 Gy under chemoradiotherapy is prognostic for locoregional control and overall survival in patients with head and neck cancer. Eur J Nucl Med Mol Imaging. 2011;38(7):1203–1211.CrossRefPubMedGoogle Scholar
- 10.Min M, Lin P, Lee MT, Shon IH, Lin M, Forstner D, et al. Prognostic role of metabolic parameters of 18F-FDG PET-CT scan performed during radiation therapy in locally advanced head and neck squamous cell carcinoma. Eur J Nucl Med Mol Imaging. 2015;42(13):1984–1994.CrossRefPubMedPubMedCentralGoogle Scholar
- 14.Porceddu SV, Pryor DI, Burmeister E, Burmeister BH, Poulsen MG, Foote MC, et al. Results of a prospective study of positron emission tomography-directed management of residual nodal abnormalities in node‐positive head and neck cancer after definitive radiotherapy with or without systemic therapy. Head Neck. 2011;33(12):1675–1682.CrossRefPubMedGoogle Scholar
- 18.Min M, Lin P, Lee M, Ho Shon I, Lin M, Forstner D, et al. Prognostic value of 2-[18F]fluoro-2-deoxy-D-glucose positron emission tomography-computed tomography scan carried out during and after radiation therapy for head and neck cancer using visual therapy response interpretation criteria. Clin Oncol. 2016;28(6):393–401.CrossRefGoogle Scholar
- 33.van Baardwijk A, Dooms C, van Suylen RJ, Verbeken E, Hochstenbag M, Dehing-Oberije C, et al. The maximum uptake of 18F-deoxyglucose on positron emission tomography scan correlates with survival, hypoxia inducible factor-1α and GLUT-1 in non-small cell lung cancer. Eur J Cancer. 2007;43(9):1392–1398.CrossRefPubMedGoogle Scholar
- 38.Brouwer CL, Steenbakkers RJ, Langendijk JA, Sijtsema NM. Identifying patients who may benefit from adaptive radiotherapy: does the literature on anatomic and dosimetric changes in head and neck organs at risk during radiotherapy provide information to help? Radiother Oncol. 2015;115(3):285–294.CrossRefPubMedGoogle Scholar
- 40.Min M, Lee MT, Lin P, Holloway L, Wijesekera D, Gooneratne D, et al. Assessment of serial multi-parametric functional MRI (diffusion-weighted imaging and R 2*) with 18F-FDG-PET in patients with head and neck cancer treated with radiation therapy. Br J Radiol. 2016;89(1058), 20150530.CrossRefPubMedPubMedCentralGoogle Scholar