Enzalutamide in Patients With Androgen Receptor Positive (AR+) Ovarian, Primary Peritoneal or Fallopian Tube Cancer and One, Two or Three Prior Therapies

Inclusion Criteria:

Advanced or recurrent epithelial ovarian, fallopian tube or primary peritoneal carcinoma. Histologic documentation of the original primary tumor is required via the pathology report
AR expression ≥5% by IHC. In cases where multiple blocks are available staining will be performed on unstained slides from 3 separate blocks. If ≥ 5% AR tumor staining is seen on ≥ 1 slide the tumor will be considered to be AR+.
Patients with the following histologic cell types are eligible: serous adenocarcinoma, endometrioid adenocarcinoma, mucinous adenocarcinoma, undifferentiated carcinoma, clear cell adenocarcinoma, mixed epithelial adenocarcinoma, transitional cell carcinoma, malignant Brenner's tumor, or adenocarcinoma not otherwise specified
Measurable disease as defined by RECIST 1.1. Measurable disease is defined as at least one lesion that can be accurately measured in at least one dimension. Each lesion must be ≥10mm when measured by CT, MRI or caliper measurement by clinical exam; or ≥ 20mm when measured by chest x-ray. Lymph nodes must be ≥ 15mm in short axis when measured by CT or MRI
Patients must have had one prior platinum-based chemotherapeutic regimen for management of primary disease
Patients may have received, but are not required to have received, one or two additional cytotoxic regimens for management of recurrent or persistent disease
Patients who have received only one prior cytotoxic regimen (platinum-based regimen management of primary disease), must have a platinum-free interval of less than 12 months, or have progressed during platinum-based therapy, or have persistent disease after a platinum-based therapy
Patients are allowed to receive, but are not required to receive, non-cytotoxic therapy (such as bevacizumab) as part of their primary treatment regimen.
Patients are allowed to receive, but are not required to receive, non-cytotoxic therapy for management of recurrent or persistent disease
Must be ≥ 18 years of age
Karnofsky Performance Status (KPS) of ≥ 70%
Life expectancy of ≥ 12 weeks Women of child-bearing potential must have a negative pregnancy test within 14 days prior to commencement of study treatment
Women of child bearing potential must use an effective form of contraception during study and for at least 6 months after completion of study treatment

Recovery from effects of recent surgery, radiotherapy, or chemotherapy

At least 4 weeks out from their last dose of radiation therapy
At least 4 weeks post-op from any major surgical procedure
At least 3 weeks out from their last dose of chemotherapy and/or biologic/targeted therapy
No prior hormonal therapy for treatment of cancer within the past 21 days
Absence of any psychological, familial, sociological or geographic condition that would potentially hamper compliance with the study protocol
Prior use of or participation in a clinical trial evaluating and agent that either blocks androgen synthesis (e.g. abiraterone acetate, TAK-700, TAK-683, TAK-448) or targets the AR (e.g., bicalutamide, BMS-641988) (patients who are known to have only received placebo in these studies are eligible)
Laboratory Test Findings performed within 14 days prior to initiation of study drug showing:

Bone marrow function:

Absolute neutrophil count (ANC) ≥ 1,000/mcL Platelets ≥ 100,000/mcL Hemoglobin ≥ 8 g/dL o Renal function: Creatinine ≤ 1.5 x ULN

o Hepatic function: Bilirubin ≤ 1.5 x ULN AST and ALT ≤ 2.5 x ULN

Resolution of all acute toxic effects of prior therapy to NCI CTCAE (Version 4.0) Grade ≤ 1, with the exception of unresolved Grade 2 neuropathy and Grade 2 alopecia, which are allowed
Patients must be able to swallow tablets whole, without crushing

Exclusion Criteria:

A history of another invasive malignancy (other than non-melanoma skin cancer or curatively treated in situ carcinoma) with evidence of disease within the past 3 years
Use of a medication known to lower the seizure threshold within 28 days of first dose of study drug
Known brain metastasis
History of seizure
Uncontrolled hypertension (systolic BP ≥ 160 mmHg or diastolic BP ≥ 95mmHg) despite medical treatment. Patients with a history of hypertension are allowed provided blood pressure is controlled by anti-hypertensive treatment.
Clinically significant heart disease as evidenced by myocardial infarction or arterial thrombotic event within the past 6 months, severe or unstable angina, or New York Heart Association (NYHA) Class II-IV heart disease or cardiac ejection fraction measurement of < 50% at baseline
Refractory nausea and vomiting, requirement for parenteral hydration and/or nutrition, drainage gastrostomy tube, malabsorption, external biliary shunt, or significant small bowel resection that would preclude adequate study drug absorption
Anticipated or ongoing administration of anti-cancer therapies other than those administered in this study