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PD-L1 Expression and Survival Rates Using TPS and CPS for Nivolumab-treated Head-and-Neck Cancer
Tatsuya Ito1, Isaku Okamoto2, Kunihiko Tokashiki1
1Department of Otorhinolaryngology, Head and Neck Surgery, Tokyo Medical University, Tokyo, Japan.
Background/Aim:
This study investigated the expression and survival rates of programmed cell death ligand 1 using the tumor proportion score (TPS)and combined positive score (CPS) for recurrent/metastatic head and neck cancer administered nivolumab.
Patients And Methods:
Forty-seven patients with recurrent/metastatic head and neck cancer with a history of platinum-based chemotherapy who received nivolumab between June 1st, 2017, and January 31st, 2019 were included in this study.
Results:
TPS and CPS were strongly correlated (r=0.546). When the TPS was high (≥40%), overall and progression-free survival were significantly better. The median overall survival was 8.5 months, median progression-free survival was not reached, and the 1-year progression-free survival rate was 71.4%. However, there was no significant difference in overall and progression-free survival between the groups with high CPS (≥20).
Conclusion:
This is the first report to show a strong correlation between TPS and CPS. High TPS (40% or higher) may be used as a predictor of prognosis and efficacy. Further studies are warranted to determine the use of the CPS as a biomarker.
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