Immunotherapy Advances in Head and Neck Cancer Treatment Highlighted
- Pembrolizumab has been approved as a first-line treatment for recurrent and metastatic head and neck squamous cell carcinoma (HNSCC), with or without chemotherapy, based on PD-L1 expression.
- Clinical trials are necessary to refine biomarker-driven protocols and standardize pathological methods for combined immunotherapy regimens in HNSCC.
- A phase II trial using nivolumab showed a promising two-year cancer-free survival rate of 73% in reversing oral premalignant lesions, warranting larger trials.
- Guidelines are needed to standardize dental care during immunotherapy, specifically regarding oral immune-related adverse events and their impact on cancer recurrence.
The landscape of head and neck squamous cell carcinoma (HNSCC) treatment is evolving with the introduction of immune checkpoint inhibitors (ICIs), offering improved outcomes for patients. For years, the standard first-line treatment for recurrent and metastatic HNSCC involved a combination of platinum-based chemotherapy, 5-fluorouracil, and cetuximab. However, the recent approval of pembrolizumab, an ICI, marks a significant advancement.
Pembrolizumab has been approved as a first-line treatment, both as a monotherapy and in combination with chemotherapy, contingent on the tumor and immune cell percentage of programmed death-ligand 1 (PD-L1). This approval signifies a shift towards personalized immunotherapy regimens guided by tumor biomarkers.
While immunotherapy regimens can now be tailored based on tumor biomarkers, further clinical trials are essential. These trials aim to refine biomarker-driven protocols, standardize pathological methods, and optimize the timing, sequencing, and de-escalation strategies for combined regimens. The goal is to enhance the efficacy and safety of immunotherapy in HNSCC.
Gaps remain in protocols utilizing immunotherapy to reverse oral premalignant lesions, particularly high-risk leukoplakias. A phase II non-randomized controlled trial, employing the ICI nivolumab, demonstrated a two-year cancer-free survival rate of 73%. These results are encouraging, but larger trials are needed to validate these findings and establish nivolumab's role in preventing cancer development in premalignant oral lesions.
Guidelines are crucial to standardize dental care, especially concerning oral immune-related adverse events and their potential impact on cancer recurrence. Managing these adverse events is vital for maintaining patients' quality of life and ensuring the continuity of cancer treatment. Standardized protocols will help healthcare professionals address and mitigate these challenges effectively.

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[1]
Immunotherapy for head and neck cancer | British Dental Journal - Nature
nature.com · Nov 21, 2024
Immune checkpoint inhibitors (ICIs) have improved outcomes in head and neck squamous cell carcinoma (HNSCC), with pembro...