Radiotherapy response in head and neck cancer - evaluation of the primary tumour site.

Abstract:

CONCLUSION:PET-CT scans seem to be sufficient to rule out residual tumour at the primary site. Patients with positive or equivocal PET findings should be scheduled for endoscopy with biopsy or a second PET-CT scan. OBJECTIVES:Assessment of remission at the primary site, in patients treated with organ preservation therapy with curative intent, is important to identify residual tumours requiring treatment with salvage surgery. The aim of this study was to evaluate the diagnostic accuracy of fluorodeoxyglucose positron emission tomography (FDG-PET) after radiotherapy with or without chemotherapy in assessing primary site response in patients with head and neck cancer. METHODS:A total of 82 patients, with a positive baseline PET-CT scan before start of treatment, were evaluated with a PET-CT scan 6-7 weeks post-radiotherapy and with a clinical examination/endoscopy with or without biopsy 1-2 weeks later. The majority of patients had p16-positive oropharyngeal tumours. RESULTS:Post-treatment, 77% of the patients had no visible hypermetabolism. If equivocal PET scans are regarded as positive, the sensitivity, specificity, negative (NPV) and positive predictive value (PPV) and accuracy were 100%, 78%, 100%, 6% and 78%, respectively. Eight patients suffered from relapses involving the primary site during the 9-month follow-up.

journal_name

Acta Otolaryngol

journal_title

Acta oto-laryngologica

authors

Sjövall J,Brun E,Almquist H,Kjellén E,Wahlberg P

doi

10.3109/00016489.2014.895038

subject

Has Abstract

pub_date

2014-06-01 00:00:00

pages

646-51

issue

6

eissn

0001-6489

issn

1651-2251

journal_volume

134

pub_type

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