Inclusion Criteria:

- Age> 18 years

- Karnofsky> 80, or ASA I-II

- Primary ovarian adenocarcinoma, or primitive peritoneal

- No retroperitoneal lymph node> 2cm (CT; MRI)

- Complete surgical staging

- Stage III-IV FIGO classification

- Indication of systemic chemotherapy before surgery or post surgery

Exclusion Criteria:

- Non Invasive Cancer

- non-epithelial or borderline cancer

- Pregnancy

- Previous pelvic lymphadenectomy or aortic-cava for a disease other than ovarian
cancer

- Contraindication to Platinum and Paclitaxel

- Borderline Ovarian Tumor

- tumor recurrence

- Incomplete surgery, resectable lesion, Surgery sub optimal (R> 1cm)