Olaparib Treatment in Relapsed Germline Breast Cancer Susceptibility Gene (BRCA) Mutated Ovarian Cancer Patients Who Have Progressed at Least 6 Months After Last Platinum Treatment and Have Received at Least 2 Prior Platinum Treatments

This open label, randomised, controlled, multi-centre study will assess the efficacy and
safety of single agent olaparib vs. standard of care, based on physician's choice of single
agent chemotherapy ( i.e paclitaxel, or topotecan, or pegylated liposomal doxorubicin, or
gemcitabine) in platinum sensitive or partially platinum sensitive relapsed ovarian cancer
patients who carry germline deleterious or suspected deleterious BRCA mutation and who have
received at least 2 prior lines of platinum based chemotherapy. Patients are eligible to
undergo BRCA testing even if they have not yet had recurrence or progression of disease >6
months (>/=183 days) after completion of their last platinum therapy.

Inclusion Criteria:

- Patients must be ≥ 18 years of age

- Patients with histologically diagnosed relapsed high grade serous ovarian cancer
(including primary peritoneal and/or fallopian tube cancer) or high grade endometrioid
cancer. Patients are eligible to undergo BRCA testing even if they have not yet had
recurrence or progression of disease >6 months (>/=183 days) after completion of their
last platinum therapy.

- Documented germline mutation in Breast Cancer susceptibility genes: BRCA1 and/or BRCA2
that is predicted to be deleterious or suspected deleterious (known or predicted to be
detrimental/lead to loss of function)

- At least one lesion that can be accurately assessed at baseline by CT/MRI and is
suitable for repeated assessment.

- Patients must have received at least 2 prior platinum based lines of chemotherapy -
Patients must be partially platinum sensitive or platinum sensitive

- Patients must be suitable to start treatment with single agent chemotherapy based on
physician's choice

- Patients must have normal organ and bone marrow function measured within 28 days of
randomisation,

- Eastern Cooperative Oncology Group (ECOG) performance status 0-2

- Patients must have a life expectancy ≥ 16 weeks

- Formalin fixed, paraffin embedded tumour sample from the primary or recurrent cancer
must be available for central testing.

Exclusion Criteria:

- BRCA 1 and/or BRCA2 mutations that are considered to be non detrimental

- Exposure to any investigational product within 30 days or 5 half lives (whichever is
longer) prior to randomisation

- Any previous treatment with a Polyadenosine 5'diphosphoribose polymerisation (PARP)
inhibitor, including olaparib.

- Patients who have platinum resistant or refractory disease

- Patients receiving any systemic chemotherapy within 3 weeks prior to first dose of
study treatment

- Previous single agent exposure to the selected chemotherapy regimen for randomisation.
- Prior malignancy in the last 5 years, unless curatively treated and recurrence free
(few exceptions apply).