Abstract
Purpose
Hypoxia has predictive value in head and neck cancer (HNC). It has been well described, albeit in a small number of clinical Centres. The aim of this study was to describe our experience using the polarographic probe technique to assess the predictive value of tumour oxygenation in patients with advanced HNC treated with hyperfractionated radio-chemotherapy. Hypoxia modification was induced using percutaneous spinal cord stimulation (SCS).
Methods/patients
Male patients (n = 12; stage IVb n = 8; IVa n = 4; mean age 58: range 46–70 years) with advanced HNC were evaluated. Planned therapy was hyperfractionated-radiotherapy, oral tegafur (precursor of 5-fluorouracil) and hypoxia modification using SCS. Pre-treatment analyses included: haemoglobin levels and tumour oxygenation (using the Eppendorf polarographic probe device). Oxygenation was expressed as median-pO2 (in mmHg) and hypoxia as the percentage of pO2 values ≤5 mmHg (HP5) and ≤2.5 mmHg (HP2.5).
Results
Lower haemoglobin levels were directly correlated with median pO2 (p = 0.017) and inversely correlated with HP5 (p = 0.020) and more advanced stages (IVb vs. IVa; p = 0.028). Patients who subsequently developed systemic metastasis had tumours that were more hypoxic, with lower median pO2 (p = 0.036) and higher HP5 (p = 0.036). The subgroup of patients with HP2.5 above the median (the most hypoxic tumours) had lower loco-regional control (p = 0.027), cause-specific survival (p = 0.008), and overall survival (p = 0.008).
Conclusions
Higher tumour hypoxia showed predictive value in HNC in our study, and was significantly associated with lower overall survival, cause-specific survival, and loco-regional control. Tumour hypoxia determination could be used to select patients who would most benefit by hypoxia modification during chemo-radiotherapy of HNC.
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Acknowledgments
We thank the nursing staff of the Functional and Stereotactic Neurosurgery Unit and Radiation Oncology Department for their dedication to patient care and management. Editorial assistance was by Dr. Peter R. Turner of Tscimed.com.
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Funding
The Eppendorf device was purchased with a grant (FUNCIS 98/31) from the Health and Research Foundation of the Autonomous Government of the Canary Islands (Spain).
Conflict of interest
Currently, Dr B. Clavo and Dr F. Robaina are in receipt of financial support from Medtronic Ibérica (Madrid, Spain) for an ongoing clinical trial involving hypoxia in brain tumours (also supported by ISCIII PI 12/02940, ClinicalTrials.gov: NCT01868906).
Informed consent
The study was fully explained to the patient before written consent was obtained.
Ethical approval
The study had the full approval of the Institutional Ethical Committee, All clinical methods were in accordance with the 1964 Helsinki declaration, and its later amendments.
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Clavo, B., Robaina, F., Fiuza, D. et al. Predictive value of hypoxia in advanced head and neck cancer after treatment with hyperfractionated radio-chemotherapy and hypoxia modification. Clin Transl Oncol 19, 419–424 (2017). https://doi.org/10.1007/s12094-016-1541-x
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DOI: https://doi.org/10.1007/s12094-016-1541-x