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Preoperative [18F]-fluorodeoxyglucose positron emission tomography standardized uptake value of neck lymph nodes may aid in selecting patients with oral cavity squamous cell carcinoma for salvage therapy after relapse

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Abstract

Purpose

Relapse of tumours in patients with oral cavity squamous cell carcinoma (OSCC) is associated with a dismal outcome. In this prospective study, we sought to investigate the clinical significance of the preoperative maximal standardized uptake value (SUVmax) at the neck lymph nodes in selecting patients with OSCC for salvage therapy after relapse.

Methods

Between 2002 and 2007, 108 patients with early relapse of OSCC (n=75) or late relapse of OSCC (n=33) were identified. Salvage therapy was performed in 47 patients. All patients underwent 2-deoxy-2[18F]-fluoro-d-glucose positron emission tomography during the 2 weeks before surgery and neck dissection. All patients were followed for 12 months or more after surgery or until death. The optimal cut-off value for the neck lymph node SUVmax (SUVnodal-max) was selected according to the 5-year disease-specific survival (DSS) rate. Independent risk factors were identified by Cox regression analysis.

Results

The mean follow-up for all patients was 20.3 months (41.1 months for surviving patients). In the early relapse group, several prognostic factors were identified in univariate and multivariate analyses, including a SUVnodal-max value of ≥4.2. A scoring system based on univariate analysis was formulated. Patients with a score of 0 had a better 5-year DSS than those with scores of 1 or higher (58% vs. 5%, p=0.0003). In patients with late relapse, a SUVnodal-max value of ≥4.2 had the highest prognostic value for predicting the 5-year DSS (45% vs. 0%, p=0.0005).

Conclusion

Among patients with relapsed OSCC, the SUVnodal-max value may aid in selecting patients for salvage therapy.

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Acknowledgment

This study was supported by grants NMRPG160031 and CMRPG370061 from the Chang Gung Memorial Hospital at Linko.

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None.

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Correspondence to Tzu-Chen Yen.

Additional information

Chun-Ta Liao and Hung-Ming Wang contributed equally to this work.

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Liao, CT., Chang, J.TC., Wang, HM. et al. Preoperative [18F]-fluorodeoxyglucose positron emission tomography standardized uptake value of neck lymph nodes may aid in selecting patients with oral cavity squamous cell carcinoma for salvage therapy after relapse. Eur J Nucl Med Mol Imaging 36, 1783–1793 (2009). https://doi.org/10.1007/s00259-009-1180-3

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  • DOI: https://doi.org/10.1007/s00259-009-1180-3

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