Role of immunotherapy in carcinoma ovary, in upfront and recurrent settings, rationale of combining immunotherapy with parp inhibitors , detailed overview using all the evidences, in detail, include all latest evidences also. Describe Using tables/ flowchart s wherever applicable. Also mention about latest guidelines for immunotherapy in ovarian cancer.

Reading File
Finding Sources
Searching PubMed

immunotherapy ovarian cancer checkpoint inhibitor

Searching PubMed

PARP inhibitor immunotherapy combination ovarian cancer

Searching the Web

NCCN ESMO guidelines immunotherapy ovarian cancer 2024 2025 pembrolizumab nivolumab

Reading Article
Reading Article
Reading Article
Reading Article
Finding Sources
Reading Web Page

immunotherapy ovarian cancer guidelines pembrolizumab PARP inhibitor combination

Reading Article
Reading Article
Searching PubMed

KEYNOTE-B96 pembrolizumab paclitaxel ovarian cancer platinum-resistant

Searching PubMed

IMagyn050 atezolizumab ovarian cancer first-line PAOLA-1 durvalumab

Reading Article
Reading Article
Searching PubMed

PAOLA-1 durvalumab bevacizumab olaparib ovarian cancer maintenance

Searching the Web

KEYNOTE-B96 pembrolizumab FDA approval February 2026 ovarian cancer platinum resistant results

Searching PubMed

PARP inhibitor immune checkpoint immunosuppression cGAS STING ovarian tumor microenvironment

Searching PubMed

DUO-O ENGOT-OV46 durvalumab olaparib bevacizumab first-line ovarian cancer

This is a detailed, fully evidence-based overview. Here is a concise orientation to the content above:

Quick Orientation

The most important 2026 development: On February 10, 2026, the FDA approved pembrolizumab + weekly paclitaxel ± bevacizumab (KEYNOTE-B96) for platinum-resistant recurrent ovarian cancer with PD-L1 CPS ≥1 - the first-ever ICI approval in ovarian cancer. The EMA followed on April 2, 2026.

Key Takeaways at a Glance

SettingICI RoleEvidence LevelGuideline Status
1st Line (upfront)Investigational onlyMultiple negative Phase III trialsNOT standard (NCCN/ESMO 2026)
Platinum-sensitive recurrenceNot effectiveNegative trials (JAVELIN, others)NOT recommended
Platinum-resistant recurrence (PD-L1 CPS ≥1)APPROVEDKEYNOTE-B96 Phase III (Lancet 2026)FDA/EMA approved Feb-Apr 2026
PARPi + ICI combinationModest benefit in selected biomarker groupsPhase III trials + 2026 meta-analysesNot standard; active trial area

The Fundamental Problem

Ovarian cancer is a "cold tumor" - low TMB, immunosuppressive TME (high Tregs, MDSCs, ascites), and heterogeneous PD-L1 expression have made it resistant to ICI monotherapy. Meta-analysis of 10 RCTs (7,847 patients, Vida et al. 2026) confirms no overall PFS or OS benefit from ICI in unselected populations.

The PARPi+ICI Story

The biological synergy is compelling (cGAS-STING activation, PD-L1 upregulation, neoantigen generation by PARPi), but clinical translation has been modest. The best signal is in the ICI+PARPi+bevacizumab triplet (PFS HR 0.71 in the 2026 meta-analysis) and in HRD+/BRCA-wt patients - but no OS benefit yet.
This is a shared conversation. Sign in to Orris to start your own chat.