16054 Background: Three separate studies have shown increased survival for women with epithelial ovarian carcinoma treated with intraperitoneal (IP) chemotherapy. Barriers to its use have included toxicity concerns. We compared the morbidity associated with IP cisplatin- based chemotherapy and IP immunologic therapies. Methods: A retrospective cohort analysis of patients diagnosed with epithelial ovarian carcinoma treated with IP chemotherapy at a single institution from 1996–2006 was performed. Patients were separated into those who received IP Interleukin-2 or Interleukin-12 and those who received cisplatin-based IP chemotherapy. Primary endpoint was completion of the intended treatments. Complications arising from the placement or use of the catheter were deemed catheter-related and included obstruction of flow or catheter site infection. Those felt to be caused by treatment toxicity (e.g. nausea, pain, fever) or progression of disease were deemed treatment-related. Chi square test was used for all univariate analysis. Results: Seventy-five patients were identified. Thirty-five (46.6%) received IL-2 or IL-12, while 40 (53.4%) received cisplatin-based chemotherapy. There were 16 complications that led to treatment termination (21.3%). Immunologic therapy had an increased frequency of early termination (n=13, 37.1%) compared to cisplatin-based therapy (n=3, 7.5%) (p=0.002). There were 3 (8.6%) catheter-related complications in the immunologic group and 2 (5%) in the cisplatin-based group (p=0.54). Reasons for termination of therapy in the immunologic therapy group were progression of disease (n=5), catheter site infection (n=3), grade 3/4 nausea (n=3), and grade 3/4 abdominal pain (n=2). In the cisplatin therapy group, reasons for termination included catheter site infection (n=1), catheter site leak (n=1), and progression of disease (n=1). Conclusion: Local-regional immunotherapy produces significantly more complications and local symptoms than cisplatin-based regimens. Catheter complications were not significantly different between the two groups, and accounted for a small percentage of the treatment terminations in this series. No significant financial relationships to disclose.