This research study evaluates the concordance of the result between two diagnostic tests: Sentinel node and Pelvic-para-aortic lymphadenectomy in patients with ovarian cancer.

The objective of this study is to describe the feasibility of performing the sentinel node technique (Detection rate) in patients with early stage ovarian cancer.

With this research study it will be evaluated the concordance of the result between two diagnostic tests: Sentinel node and Pelvic-para-aortic lymphadenectomy in patients with ovarian cancer.

Inclusion Criteria:

• Informed consent signed previously to performing any procedure related to the clinical trial.
• Patients who are women 18 years of age or older at the moment of the randomization.
• Patients with anatomopathological diagnosis of malignant ovarian tumor in a deferred study proposals for staging surgery or patients with suspicious tumor of malignancy who are going to be subjected to exploratory lapaotomy or laparoscopy and operative biopsy, and in the case this is positive, surgery of staging will be performed .

Exclusion Criteria:

• Informed consent not obtained or withdraw.
• Benign result in extemporaneous study
• Previous history of vascular surgery in the aorta, cava or pelvic vessels
• Previous pelvic or para-aortic lymphadenectomy
• Previous lymphoma
• Previous abdomino-pelvic tumor
• Previous allergic reaction to indocyanine green
• Pregnancy / lactation
• Severe adherent syndrome