Ovarian Cancer Stage III: Tumor involves one or both ovaries with peritoneal spread outside pelvis or positive retroperitoneal/inguinal lymph nodes
Reviewed by Oncology Team, VICI Healthcare | Last updated: 2026-04
What Stage III: Tumor involves one or both ovaries with peritoneal spread outside pelvis or positive retroperitoneal/inguinal lymph nodes Means
IIIA1 (positive retroperitoneal nodes only); IIIA2 (peritoneal tumor ≤10mm outside pelvis); IIIB (peritoneal tumor 10-20mm); IIIC (peritoneal tumor >20mm or positive inguinal nodes). Most common at diagnosis in India (50-60% of cases).
Treatment Approach for Stage III: Tumor involves one or both ovaries with peritoneal spread outside pelvis or positive retroperitoneal/inguinal lymph nodes
Neoadjuvant chemotherapy (3 cycles) followed by debulking surgery, then completion chemotherapy (3 cycles). Carboplatin + paclitaxel + bevacizumab (anti-angiogenic). Increasingly, PARP inhibitors (olaparib, niraparib) used as maintenance for BRCA-mutant or homologous recombination deficiency (HRD) positive tumors.
Survival Rates and Prognosis
The 5-year survival rate for ovarian cancer at Stage III: Tumor involves one or both ovaries with peritoneal spread outside pelvis or positive retroperitoneal/inguinal lymph nodes is approximately 40-50% 5-year survival with optimal treatment. Survival rates are statistical averages drawn from large patient populations and may not reflect your individual outcome. Factors that influence your specific prognosis include your age, overall health, tumour biology, and how well the cancer responds to treatment.
Important: These numbers are drawn from historical data. Newer treatments available today may improve outcomes beyond what published statistics show. Discuss your individual prognosis with your oncologist.
How Other Stages Compare
| Stage | 5-Year Survival | Treatment |
|---|---|---|
| Stage I: Tumor confined to ovaries | 90-95% 5-year survival | Surgery (unilateral salpingo-oophorectomy or total abdominal hysterectomy +… |
| Stage II: Tumor involves one or both ovaries with extension to pelvis | 70-80% 5-year survival | Optimal surgery (total hysterectomy, bilateral salpingo-oophorectomy,… |
| Stage IV: Distant metastases (hepatic parenchyma, lung, pleura, brain, etc.) or positive pleural effusion cytology | 10-20% 5-year survival with multimodal therapy | Palliative chemotherapy (carboplatin + paclitaxel + bevacizumab), targeted… |
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Diagnosed with Stage III: Tumor involves one or both ovaries with peritoneal spread outside pelvis or positive retroperitoneal/inguinal lymph nodes Ovarian Cancer?
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