<qa>  What is the most common type of lymphadenectomy?In the literature there is only one prospective randomized study on lymphadenectomy in advanced ovarian cancer without node lesions macroscopically observed bulky nodes during the first surgery. The authors reported a significant benefit in terms of disease free survival DFS, but not in terms of overall survival OS in patients who underwent systematic lymphadenectomy and who had a residual tumor 1 cm. Patients with intra-abdominal residual tumor 1 cm could theoretically not benefit from a systematic lymphadenectomy since most of lymph node metastases undetectable to intraoperative assessment are smaller than 1 cm. 