OnCo
pairingsPairing

PD-1 blockade + chemoradiation (locally advanced cervical cancer)

Adding pembrolizumab to curative chemoradiation improved survival in high-risk locally advanced cervical cancer (KEYNOTE-A18); durvalumab in a broader population did not (CALLA).

KEYNOTE-A18: 36-month OS 82.6% vs 74.8% (HR 0.67); FDA approval for FIGO III-IVA (2024). CALLA (durvalumab) was negative, possibly because it enrolled lower-risk patients and used a different drug. Cost limits use outside high-income countries.

Rationale
Radiation-induced antigen release and PD-L1 upregulation make the tumour immunogenic; concurrent and maintenance PD-1 blockade sustains the response.
Evidence
Phase 3 OS benefit (KEYNOTE-A18); negative sister trial (CALLA).

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