Patient description: The patient is a 37-year-old woman who came to the clinic for a routine Pap smear. The test revealed stage 1B of cervical cancer. The patient tested positive for HPV 16. She has three sexual partners and four children. She underwent tubal ligation. She smokes 30 packs/year and drinks alcohol frequently. She is otherwise healthy. She was offered a radical hysterectomy.

Clinical trial eligibility criteria: eligible ages (years): 18.0-999.0,  BRCA-Mutated Ovarian Carcinoma BRCA1 Gene Mutation BRCA2 Gene Mutation High Grade Fallopian Tube Serous Adenocarcinoma High Grade Ovarian Serous Adenocarcinoma Primary Peritoneal High Grade Serous Adenocarcinoma Stage III Fallopian Tube Cancer AJCC v8 Stage III Ovarian Cancer AJCC v8 Stage III Primary Peritoneal Cancer AJCC v8 Stage IIIA Fallopian Tube Cancer AJCC v8 Stage IIIA Ovarian Cancer AJCC v8 Stage IIIA Primary Peritoneal Cancer AJCC v8 Stage IIIA1 Fallopian Tube Cancer AJCC v8 Stage IIIA1 Ovarian Cancer AJCC v8 Stage IIIA2 Fallopian Tube Cancer AJCC v8 Stage IIIA2 Ovarian Cancer AJCC v8 Stage IIIB Fallopian Tube Cancer AJCC v8 Stage IIIB Ovarian Cancer AJCC v8 Stage IIIB Primary Peritoneal Cancer AJCC v8 Stage IIIC Fallopian Tube Cancer AJCC v8 Stage IIIC Ovarian Cancer AJCC v8 Stage IIIC Primary Peritoneal Cancer AJCC v8 Stage IV Fallopian Tube Cancer AJCC v8 Stage IV Ovarian Cancer AJCC v8 Stage IV Primary Peritoneal Cancer AJCC v8 Stage IVA Fallopian Tube Cancer AJCC v8 Stage IVA Ovarian Cancer AJCC v8 Stage IVA Primary Peritoneal Cancer AJCC v8 Stage IVB Fallopian Tube Cancer AJCC v8 Stage IVB Ovarian Cancer AJCC v8 Stage IVB Primary Peritoneal Cancer AJCC v8 Written informed consent and any locally-required authorization (e.g., Health Insurance Portability and Accountability Act [HIPAA] in the United States of America [USA]) obtained from the subject prior to performing any protocol-related procedures, including screening evaluations Histology showing high-grade epithelial non-mucinous ovarian, primary peritoneal, or fallopian tube cancer Documented BRCA pathway mutations No prior treatment for primary advanced (stage III or IV) epithelial ovarian, primary peritoneal, or fallopian tube carcinoma such as irradiation, chemotherapy, hormonal therapy, immunotherapy, investigational therapy, surgery, and/or other concurrent agents or therapies A disposition to neoadjuvant chemotherapy (NACT) with planned interval tumor reductive surgery after 3 complete cycles of treatment Have measurable disease based on version 1.1 or evaluable disease. Measurable disease is defined at least one lesion that can be accurately measured in at least one dimension (longest dimension to be recorded). Each "target" lesion must be > 20 mm when measured by conventional techniques, including palpation, plain x-ray, computed tomography (CT), and magnetic resonance imaging (MRI), or > 10 mm when measured by spiral CT. Evaluable disease includes nonmeasurable lesions, ascites, pleural effusion Peripheral neuropathy grade 0 or 1 by Common Terminology for Adverse Events (CTCAE) version (v)5.0 Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1 Life expectancy of >= 16 weeks Postmenopausal or evidence of non-childbearing status for women of childbearing potential: negative urine or serum pregnancy test within 28 days of study treatment and confirmed prior to treatment on day 1. Postmenopausal is defined as: amenorrheic for 1 year or more following cessation of exogenous hormonal treatments, luteinizing hormone (LH) and follicle stimulating hormone (FSH) levels in the postmenopausal range for women under 50, radiation-induced oophorectomy with last menses > 1 year ago, chemotherapy-induced menopause with > 1 year interval since last menses, or surgical sterilization (bilateral oophorectomy or hysterectomy). Women of childbearing potential (WoCBP) must utilize acceptable contraception for two weeks before the first dose of olaparib, for the duration of the study, and for at least 6 months after the last dose of olaparib  Involvement in the planning and/or conduct of the study (applies to both AstraZeneca staff and/or staff at the study site) Previous enrollment in the present study Prior treatment for ovarian, fallopian tube, or primary peritoneal cancer Histology showing mucinous or low grade epithelial carcinoma Participation in another clinical study with an investigational product (IP) during the last 4 weeks History of another primary malignancy except for: malignancy treated with curative intent and with no known active disease >= 5 years before the first dose of study drug and of low potential risk for recurrence, adequately treated non-melanoma skin cancer or lentigo maligna without evidence of disease, and/or adequately treated carcinoma in situ without evidence of disease e.g., cervical cancer in situ Resting electrocardiogram (ECG) indicating uncontrolled, potentially reversible cardiac conditions, as judged by the investigator (e.g., unstable ischemia, uncontrolled symptomatic arrhythmia, congestive heart failure, mean QT interval corrected for heart rate with Fridericia's correction (QTcF) prolongation > 500 ms, electrolyte disturbances, etc.), or patients with congenital long QT syndrome Any unresolved toxicity (> CTCAE grade 2) from previous anti-cancer therapy, excluding alopecia History of hypersensitivity to olaparib or its excipients Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, uncontrolled hypertension, unstable angina pectoris, cardiac arrhythmia, active peptic ulcer disease or gastritis, active bleeding diatheses including any subject known to have evidence of acute or chronic hepatitis B, hepatitis C or human immunodeficiency virus (HIV) or otherwise immunocompromised subjects, or psychiatric illness/social situations that would limit compliance with study requirements or compromise the ability of the subject to give written informed consent