Feasibility of Interval Debulking Surgery by Laparoscopy for Peritoneal Carcinosis in Chemosensitive Patients

Inclusion Criteria: * Age \> or = 18 years * performance status WHO \< 2 * Epithelial ovarian, fallopian tubes or primary peritoneal carcinoma (histologically confirmed) * Unresectable disease because of FIGO stage IV disease proven by imaging (CT Scan or PET CT) and/or diffuse extensive carcinosis considered unresectable for advanced FIGO stage IIIc; or patients unable to support a radical primary surgery because of age, comorbidities or altered general condition. * No previous debulking surgery before neoadjuvant chemotherapy. * Patients treated with a minimum of 3 cycles of platinum-based neoadjuvant chemotherapy. * Response to chemotherapy was radiologically confirmed (Scan-TAP) prior to interval surgery: No evidence of peritoneal supra-mesocolic carcinomatosis ; Residual pelvic masses smaller than 10 cm ; Absence of suspect supra-centimeter retroperitoneal lymphadenopathy * able to read, write and understand French. * Member of a Social Security scheme. * written informed consent. Exclusion Criteria: * Patient unable to support laparoscopy * psychiatric condition or social or geographic situation that would impede appropriate study participation * Concomitant participation in another clinical trial evaluating surgical treatment (interfering with the evaluation of the main endpoint)