Primary evaluation of the safety, tolerability and feasibility regarding specific postoperative complications of an adjuvant treatment with catumaxomab administered after tumor resection.

An open label, multi-center, single-arm, phase II study according to Fleming´s one-stage design. The surgical procedure on Day 0 will be performed according to AGO State of the Art, followed by one intraoperative and four postoperative intraperitoneal administrations of catumaxomab within 16 days. The Discharge Visit will be performed when the patient is leaving the hospital but not earlier than 1 day after the last infustion, followed by the End of Study Visit on Day 30.

Catumaxomab is a trifunctional antibody targeting EpCAM on tumor cells and CD3 on T cells. Trifunctional antibodies represent a new concept for targeted anticancer therapy. This new antibody class has the capability to redirect T cells and accessory cells (e.g. macrophages, dendritic cells [DCs] and natural killer [NK] cells) to the tumor site. According to preclinical data, trifunctional antibodies activate these different immune effector cells, which can trigger a complex anti-tumor immune response.

Inclusion Criteria:

• signed and dated informed consent form before any protocol-specific screening procedures
• patients has a primary diagnosis of an epithelial ovarian cancer including clear cell carcinoma (FIGO IA(G2-G3) - IV)
• Karnofsky index > or equal 70
• female at an age of 18 years or older
• negative pregnancy test

Exclusion Criteria:

• exposure to prior cancer therapy specific for ovarian cancer
• previos treatment with non-humanized mouse or rat monoclonal antibodies
• known / suspected hypersensitivity to catumaxomab or similar antibodies
• second malignangcy within the last 5 years
• presence of constant immunosuppressive therapy
• presence of symptomatic heart failure or occlusive arterial diseases
• inadequate renal or hepatic function
• presence of any acute or chronic systemic infection