Background/Aim: CHORUS and EORTC55971 trials demonstrated that neoadjuvant chemotherapy followed by interval debulking surgery (IDS) or primary debulking surgery (PDS) offered the same survival rates. These trials have since been criticised due to poor surgical complexity. We compared overall (OS), progression free (PFS), and platinum sensitivity in advanced ovarian cancer (AOC) patients undergoing IDS or PDS, who had received either intermediate or high complexity surgery to achieve complete cytoreduction. Patients and Methods: All patients with AOC treated between February 2014 and May 2019 obtaining complete cytoreduction with intermediate/high surgical complexity were included. Recurrence was defined according to GCIG criteria on radiological findings and/or CA125 levels. Results: Seventy-one patients (38 PDS and 33 IDS) with full recurrence data were identified. No statistical difference was seen between groups in OS, PFS or platinum sensitive interval. Conclusion: PDS or IDS were both acceptable treatment options for AOC, showing similar survival and platinum sensitivity outcomes in patients undergoing intermediate or high complexity surgery.

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