Tumor reduction surgery and long-term survival in advanced ovarian cancer: a DACOVA study.

Three hundred sixty-one patients with FIGO stage III and IV ovarian cancer were treated with cis-platinum combination chemotherapy in a Danish multicenter trial. Primary surgery was performed at 58 different departments; 32% of the patients were operated at a department associated with an oncologic center, 50% at a general gynecologic department, and 18% at a general surgical department. Complete pathologic response and long-term survival were similar for patients operated on in the different departments. Patients who underwent radical surgery or optimal debulking had a 10% risk of progression during chemotherapy and a 5-year survival of 46%. Patients who underwent suboptimal debulking and exploratory laparotomy had a 40% risk of progression during chemotherapy and a 5-year survival of 14%. Complete pathologic response showed an insignificant difference between radical surgery and optimally tumor reduction (57% versus 41%) and a significant difference between suboptimal tumor reduction and exploratory laparotomy (19% versus 6%). Patients secondarily tumor reduced had a survival rate superior to that of patients not secondarily tumor reduced (25% versus 4% at 4 years).