Abstract
OBJECTIVE: To assess the accuracy of a 4-month post-(chemo)radiotherapy 18-fludeoxyglucose ((18)F-FDG) positron emission tomography (PET)-CT for head and neck squamous cell carcinoma (HNSCC).
METHODS: 105 patients who underwent a baseline and response assessment (18)F-FDG PET-CT scan between 2008 and April 2013 were identified. (18)F-FDG PET-CT outcomes were analysed with reference to clinicopathological outcomes.
RESULTS: 79 of 105 (75%) (18)F-FDG PET-CT scans demonstrated a complete metabolic response; 19 of 101 (19%) for assessable primary tumours were positive; and 19 of 93 (20%) for patients with nodal disease were equivocal (n = 10) or positive (n = 9). The sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) for primary and nodal disease were 90%, 89%, 47%, 99% and 91%, 89%, 53% and 99%, respectively. Eight of nine patients with a positive nodal response scan had clinicopathological evidence of residual nodal disease (PPV, 89%). 2 of 10 patients with equivocal nodal responses had clinicopathological evidence of residual nodal disease (PPV, 20%).
CONCLUSION: (18)F-FDG PET-CT 4 months post treatment has a very high NPV. A positive (18)F-FDG PET-CT has a high PPV for residual nodal disease. By contrast, patients who have an equivocal nodal response have a low PPV.
ADVANCES IN KNOWLEDGE: Response assessment (18)F-FDG PET-CT is a valuable tool in guiding the selective use of neck dissection following (chemo)radiotherapy for HNSCC. An equivocal lymph node response has a limited predictive value for persistent disease, and optimal management remains a clinical challenge.
Original language | English |
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Pages (from-to) | 20140592 |
Journal | British Journal of Radiology |
Volume | 88 |
Issue number | 1052 |
Early online date | 8 Jul 2015 |
DOIs | |
Publication status | Published - Aug 2015 |
Keywords
- Adult
- Aged
- Antineoplastic Combined Chemotherapy Protocols
- Carboplatin
- Carcinoma, Squamous Cell
- Chemoradiotherapy
- Cisplatin
- Female
- Fluorodeoxyglucose F18
- Head and Neck Neoplasms
- Humans
- Male
- Middle Aged
- Positron-Emission Tomography
- Radiopharmaceuticals
- Retrospective Studies
- Sensitivity and Specificity
- Tomography, X-Ray Computed
- Treatment Outcome
- Evaluation Studies
- Journal Article