Trial reportClinical cancer research : an official journal of the American Association for Cancer Research2026
FDG-PET-Based Selective Deescalation of Chemoradiation in Human Papillomavirus-Related Oropharyngeal Squamous Cell Carcinoma: A Multicenter Phase II Trial.
Trial report in Clinical cancer research : an official journal of the American Association for Cancer Research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
2 citing papers in PubMed.
- Validation of MyHPVscore: A High-Performance Human Papillomavirus Circulating Tumor DNA Laboratory-Developed Test.The Journal of molecular diagnostics : JMD · 2026Article
- Simultaneous Versus Sequential IMRT Boost in the Era of Treatment De-Escalation of Head and Neck Cancers.Cancers · 2026Review
Corrections and comments
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Authors and funding
28 authors.
Funding
Abstract
purposeWe conducted a phase II multicenter clinical trial to test the hypothesis that 18F-fluorodeoxyglucose positron emission tomography (FDG-PET)-based chemoradiation (CRT) dose deescalation would provide noninferior locoregional control compared with historical controls among patients with early-stage p16+ oropharyngeal cancer. We also hypothesized that human papillomavirus (HPV) circulating tumor DNA (ctDNA) changes during treatment predict locoregional recurrence (LRR). PATIENTS AND
methodsPatients with stage I/II p16+ oropharyngeal squamous cell carcinoma were planned to receive radiation 70 Gy in 35 fractions with concurrent weekly carboplatin and paclitaxel. All patients underwent FDG-PET at baseline and at radiation therapy (RT) fraction 10. Patients with ≥50% decrease from baseline to mid-treatment metabolic tumor volume had treatment deescalated to 54 Gy in 27 fractions. The primary endpoint was LRR. Plasma HPV ctDNA was evaluated weekly and in surveillance.
resultsOf 84 evaluable patients, 43% met deescalation criteria. With a median follow-up of 37.8 months, 24-month LRR for the entire cohort was 7.8% [90% confidence interval (CI), 2.6%-12.6%], which was less than the 25% rate specified for assessing noninferiority, thereby meeting the primary endpoint. At 1 month after RT, the mean of multiple quality of life measures between the two groups was improved in the 54 Gy cohort, exceeding the minimal clinically important difference threshold. During CRT, week 1 percentage increase in ctDNA relative to baseline was significantly associated with worse loco-regional control (LRC; HR = 1.052 per 10 percentage point increase in ctDNA; 95% CI, 1.007-1.099; P = 0.023) and loco-regional progression-free survival (HR = 1.038; 95% CI, 1.002-1.076; P = 0.035).
conclusionsFDG-PET-based RT dose personalization resulted in promising LRR outcomes in early-stage oropharynx cancer with improved short-term patient-reported outcomes. Furthermore, HPV ctDNA changes early in treatment may predict LRC.
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