SYD985 in Patients With HER2-expressing Recurrent, Advanced or Metastatic Endometrial Carcinoma

Main Inclusion Criteria:

• Females with histologically confirmed recurrent, advanced or metastatic endometrial carcinoma
• Eligible patients should have progressed on or after first line platinum-based chemotherapy for advanced/metastatic endometrial cancer. Patients who have had two or more lines of chemotherapy for advanced/metastatic disease are not eligible, taking into account the following:
• Patients may have received up to one additional line of chemotherapy if given in the neoadjuvant or adjuvant setting. If such treatment was completed less than 6 months prior to the current tumor recurrence or progression it is to be considered first-line treatment;
• No more than one line of non-cytotoxic systemic cancer therapy (such as immunotherapy, trastuzumab or protein kinase inhibitors) is allowed.
• HER2 tumor expression defined as a 1+, 2+ or 3+ score on IHC or positive by ISH
• At least one measurable cancer lesion as defined by the Response Evaluation Criteria for Solid Tumours (RECIST version 1.1);
• Eastern Cooperative Oncology Group (ECOG) performance status ≤ 2;

Exclusion Criteria

• Current or previous use of a prohibited medication as listed in the protocol;
• History of infusion-related reactions and/or hypersensitivity to trastuzumab;
• History of keratitis;
• Severe, uncontrolled systemic disease at screening;
• Left Ventricular Ejection Fraction (LVEF) < 50%, or a history of clinically significant decrease in LVEF during previous treatment with trastuzumab;
• History of clinically significant cardiovascular disease;
• Symptomatic brain metastases, brain metastases requiring steroids to manage symptoms, or treatment for brain metastases within 8 weeks prior to randomization;
• History or presence of idiopathic pulmonary fibrosis, organizing pneumonia (e.g. bronchiolitis obliterans), drug-induced pneumonitis, idiopathic pneumonitis, or evidence of active pneumonitis on screening chest computed tomography (CT) scan.