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Phase II/III study of weekly docetaxel+RT vs. RT alone in cis-ineligible patients. This study was done in India, where oral cancers are an epidemic and possibly biologically unique, as most are related to the use of oral tobacco + betel nut products. >70% of patients were stage IVA / IVB, and HPV was only positive in 4% of patients. Still, the survival benefit was sizeable, and the treatment was tolerable. This is a good option for cis-ineligible HPV-neg patients with bulky disease.
There is a lack of published literature on systemic therapeutic options in cisplatin-ineligible patients with locally advanced head and neck squamous cell carcinoma (LAHNSCC) undergoing chemoradiation. Docetaxel was assessed as a radiosensitizer in this situation.
This was a randomized phase II/III study. Adult patients (age ≥ 18 years) with LAHNSCC planned for chemoradiation and an Eastern Cooperative Oncology Group performance status of 0-2 and who were cisplatin-ineligible were randomly assigned in 1:1 to either radiation alone or radiation with concurrent docetaxel 15 mg/m2 once weekly for a maximum of seven cycles. The primary end point was 2-year disease-free survival (DFS).
The study recruited 356 patients between July 2017 and May 2021. The 2-year DFS was 30.3% (95% CI, 23.6 to 37.4) versus 42% (95% CI, 34.6 to 49.2) in the RT and Docetaxel-RT arms, respectively (hazard ratio, 0.673; 95% CI, 0.521 to 0.868; P value = .002). The corresponding median overall survival (OS) was 15.3 months (95% CI, 13.1 to 22.0) and 25.5 months (95% CI, 17.6 to 32.5), respectively (log-rank P value = .035). The 2-year OS was 41.7% (95% CI, 34.1 to 49.1) versus 50.8% (95% CI, 43.1 to 58.1) in the RT and Docetaxel-RT arms, respectively (hazard ratio, 0.747; 95% CI, 0.569 to 0.980; P value = .035). There was a higher incidence of grade 3 or above mucositis (22.2% v 49.7%; P < .001), odynophagia (33.5% v 52.5%; P < .001), and dysphagia (33% v 49.7%; P = .002) with the addition of docetaxel.
The addition of docetaxel to radiation improved DFS and OS in cisplatin-ineligible patients with LAHNSCC.
Based on these findings, Carbo/Taxol+Pembro is an active regimen in met-HNC and an option for those patients who are not good candidates for 5FU based therapy.
Although immunotherapy did not beat chemotherapy but was non inferior and with more favorable safety.
Pembro with chemotherapy or alone better then cetuximab combination, also improved responses to subsequent therapy.
Again, further evidence of continued efficacy and tolerability of IO and IO/chemotherapy in SCCHN as compared to EGFR-blockade/chemotherapy. The PD-L1 negative space remains a more difficult scenario, hence new biomarkers are critically important. The long-term response and CR of a percentage of patients are real and intriguing (patient characteristics leading to such response).
Given relatively low-toxicities of capecitabine, it is reasonable to consider it especially in a population with fewer comorbidities and preserved performance-status. More data pertaining OS differences will be welcome. Study is relatively small but not unusual for this diagnosis.
FCS Hematology Oncology Review creates a platform for our physician network to observe the most recent articles and studies available in the oncology and hematology world. By sharing these articles we are building our wealth of knowledge of new observations and treatments as they come available.
