A Study Of Avelumab Alone Or In Combination With Pegylated Liposomal Doxorubicin Versus Pegylated Liposomal Doxorubicin Alone In Patients With Platinum Resistant/Refractory Ovarian Cancer (JAVELIN Ovarian 200)

Inclusion Criteria:

* Histologically confirmed epithelial ovarian, fallopian tube, or peritoneal cancer, including malignant mixed Müllerian tumors with high grade serous component.
* Platinum resistant/refractory disease, defined as disease progression within 180 days following the last administered dose of platinum therapy (resistant), or lack of response or disease progression while receiving the most recent platinum based therapy (refractory), respectively.
* Received up to 3 lines of systemic anticancer therapy for platinum sensitive disease, most recently platinum containing, and no prior systemic therapy for platinum resistant disease
* Measurable disease by investigator assessment with at least 1 unidimensional measurable lesion by RECIST v.1.1 that has not previously been irradiated
* Active autoimmune disease that might deteriorate when receiving an immunostimulatory agents. Patients with diabetes type I, vitiligo, psoriasis, hypo or hyperthyroid disease not requiring immunosuppressive treatment are eligible.

Mandatory tumor biopsy must be performed prior to enrollment for all patients (unless there is a documented clinical contraindication). In addition, availability of archived FFPE tumor tissue should be confirmed. If a patient underwent tumor tissue collection within 3 months prior to enrollment with no intervening treatment, and the sample is provided, then a new de novo tumor biopsy is not required.

Exclusion Criteria:

* Non epithelial tumor or ovarian tumors with low malignant potential (ie, borderline tumors).
* Prior therapy with an anti PD 1, anti PD L1, anti PD L2, anti CD137, or anti cytotoxic T lymphocyte associated antigen 4 (CTLA 4) antibody (including ipilimumab, tremelimumab or any other antibody or drug specifically targeting T cell co stimulation or immune checkpoint pathways).
* Known symptomatic brain metastases requiring steroids. Patients with previously diagnosed brain metastases are eligible if they have completed their treatment and have recovered from the acute effects of radiation therapy or surgery prior to study entry, have discontinued corticosteroid treatment for these metastases for at least 4 weeks prior to study entry and are neurologically stable.
* Diagnosis of any other malignancy within 5 years prior to registration, except for adequately treated basal cell or squamous cell skin cancer, or carcinoma in situ of the breast or of the cervix.
* Severe gastrointestinal conditions such as clinical or radiological evidence of bowel obstruction within 4 weeks prior to study entry, uncontrolled diarrhea in the last 4 weeks prior to enrollment, or history of inflammatory bowel disease.