GOG 157

Randomized phase III trial of three versus six cycles of adjuvant carboplatin and paclitaxel in early stage epithelial ovarian carcinoma: a Gynecologic Oncology Group study.

Pubmed

Hypothesis: 6 cycles of carboplatin (AUC 7.5) and paclitaxel (175mg/m2) improves survival compared to 3 cycles.

Site: Ovary

Eligibility: Stage IA/IB (Grade 3 or clear cell) or stage II completely resected

Experimental arm: 6 cycles of AUC 7.5 carboplatin and 175 mg/m2 of Paclitaxel

Standard Arm: 3 cycles of AUC 7.5 carboplatin and 175 mg/m2 of Paclitaxel

Primary Outcome:

Results:
n=457 enrolled; 427 final cohort
69% were stage 1
31% were stage 2

Parameter 3 cycles 6 cycles p-value
5-year recurrence rate 25.4% 20.1% ns
Adjusted Recurrence rate 1 ref 0.761 (0.51 – 1.13) 0.18
Neurotoxicity G4 2% 11% ss
Neutropenia G4 52% 66% ss
Anemia 32% 48% ss

ss: statistically significant
ns: not statistically significant

Conclusions:

  • 3 cycles of chemotherapy are non-inferior to 6 cycles after complete surgical staging
  • Post-hoc analysis PubmedSerous tumors 6 cycles improve survival

Limitations:

  • High dose of Carboplatin (AUC 7.5)
  • High proportion of incompletely staged patients (about 30%)
  • Study likely underpowered to show difference between 3 and 6 cycles, so although the null hypothesis is no difference, there may be a difference which would have been seen in a fully powered study

  1. Adjusted for FIGO stage and grade ↩︎

SOLO-1: Maintenance Olaparib in Newly Diagnosed Advanced Ovarian Cancer

Title: Maintenance Olaparib in Newly Diagnosed Advanced Ovarian Cancer

Hypothesis: Maintenance PARP-i after initial therapy in high-grade ovarian carcinoma improves progression free survival.

Standard Arm: Placebo

Experimental Arm: Olaparib 300 mg bid daily x 2 years

Design: Double blinded randomized controlled phase 3 study

Inclusion Criteria: High-grade serous or endometrioid ovarian cancer, primary peritoneal cancer, or fallopian-tube cancer with mutation in BRCA1, BRCA2 (germline or somatic)

Primary Endpoint: PFS or death at 3 years

Outcomes: Experimental vs. Standard arm (p-value)

PFS/death at 3 years: 60% vs. 27% (p<0.001)

Median time to subsequent therapy: 51.8 months vs. 15.1 months (HR – 0.30, p<0.001)

Serious Adverse Events:Experimental vs. Standard arm (p-value)

Anemia (G3/G4): 22% vs. 2% (p=s.s.)

Neutropenia (G3/G4): 9% vs. 5% (p=s.s.)

AML: 3/260 (1%) vs. 0/130 (0%) (p=n.s)

New Primary Cancer: 5/260 (2%) vs. 3/130 (2%) (p=n.s.)

Pneumonitis/Interstitial Lung Disease: 5/260 (2%) vs. 0 (p=n.s)

Conclusion: Addition of Olaparib 300mg bid for two years maintenance after completion of primary chemotherapy and debulking surgery in BRCA 1/2 (both germline or somatic) increases progression free survival or risk of death at 3 years.