1. Long-term Follow-up of the RTOG 9501/Intergroup Phase III Trial: Postoperative Concurrent Radiation Therapy and Chemotherapy in High-Risk Squamous Cell Carcinoma of the Head and Neck
- Author
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Cooper, Jay S, Zhang, Qiang, Pajak, Thomas F, Forastiere, Arlene A, Jacobs, John, Saxman, Scott B, Kish, Julie A, Kim, Harold E, Cmelak, Anthony J, Rotman, Marvin, Lustig, Robert, Ensley, John F, Thorstad, Wade, Schultz, Christopher J, Yom, Sue S, and Ang, K Kian
- Subjects
Biomedical and Clinical Sciences ,Clinical Sciences ,Oncology and Carcinogenesis ,Rare Diseases ,Prevention ,Dental/Oral and Craniofacial Disease ,Clinical Trials and Supportive Activities ,Cancer ,Clinical Research ,6.1 Pharmaceuticals ,6.4 Surgery ,6.5 Radiotherapy and other non-invasive therapies ,Evaluation of treatments and therapeutic interventions ,Antineoplastic Agents ,Carcinoma ,Squamous Cell ,Cisplatin ,Disease-Free Survival ,Head and Neck Neoplasms ,Humans ,Lymphatic Metastasis ,Neoplasm Recurrence ,Local ,Postoperative Care ,Prospective Studies ,Radiation-Sensitizing Agents ,Radiotherapy ,Smoking ,Time Factors ,Other Physical Sciences ,Oncology & Carcinogenesis ,Oncology and carcinogenesis ,Theoretical and computational chemistry ,Medical and biological physics - Abstract
PurposePrevious analysis of this Intergroup trial demonstrated that with a median follow-up among surviving patients of 45.9 months, the concurrent postoperative administration of cisplatin and radiation therapy improved local-regional control and disease-free survival of patients who had high-risk resectable head-and-neck carcinomas. With a minimum of 10 years of follow-up potentially now available for all patients, these results are updated here to examine long-term outcomes.Methods and materialsA total of 410 analyzable patients who had high-risk resected head-and-neck cancers were prospectively randomized to receive either radiation therapy (RT: 60 Gy in 6 weeks) or identical RT plus cisplatin, 100 mg/m(2)i.v. on days 1, 22, and 43 (RT + CT).ResultsAt 10 years, the local-regional failure rates were 28.8% vs 22.3% (P=.10), disease-free survival was 19.1% vs 20.1% (P=.25), and overall survival was 27.0% vs 29.1% (P=.31) for patients treated by RT vs RT + CT, respectively. In the unplanned subset analysis limited to patients who had microscopically involved resection margins and/or extracapsular spread of disease, local-regional failure occurred in 33.1% vs 21.0% (P=.02), disease-free survival was 12.3% vs 18.4% (P=.05), and overall survival was 19.6% vs 27.1% (P=.07), respectively.ConclusionAt a median follow-up of 9.4 years for surviving patients, no significant differences in outcome were observed in the analysis of all randomized eligible patients. However, analysis of the subgroup of patients who had either microscopically involved resection margins and/or extracapsular spread of disease showed improved local-regional control and disease-free survival with concurrent administration of chemotherapy. The remaining subgroup of patients who were enrolled only because they had tumor in 2 or more lymph nodes did not benefit from the addition of CT to RT.
- Published
- 2012