Abstract
Aim: PD-L1 expression and high levels of microsatellite instability (MSI-H) may predict response to checkpoint inhibitors, but their prevalence and prognostic value are unknown in many cancers.
Methods: We retrospectively evaluated PD-L1 combined positive score (CPS) and MSI-H and their association with clinical outcomes among patients with ten advanced uncommon cancers.
Results: 398 of 426 patients (93%) had a valid PD-L1 result; most (242; 61%) had CPS ≥1. Prevalence of MSI-H tumors was 8/360. Median overall survival was shorter among patients with PD-L1 CPS ≥1 tumors after first-line treatment (23.0 vs 39.7 months, p = 0.014).
Conclusion: PD-L1 was commonly expressed in solid tumors, and CPS ≥1 was associated with shorter overall survival. Prevalence of MSI-H was low.
| Original language | English |
|---|---|
| Article number | FSO616 |
| Journal | Future Science OA |
| Volume | 6 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 19 Aug 2020 |
Keywords
- anal carcinoma
- biliary adenocarcinoma
- cervical carcinoma
- endometrial carcinoma
- mesothelioma
- neuroendocrine tumors
- salivary gland carcinoma
- small-cell lung carcinoma
- thyroid carcinoma
- vulvar carcinoma
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